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INSUFFICIENT RELIABLE EVIDENCE to RATE

• Allergic rhinitis (hay fever). Although there has been interest in using oral bromelain for allergic rhinitis, there is insufficient reliable information about the clinical effects of bromelain for this condition.
• Aromatase inhibitor-induced arthralgia. Oral bromelain has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A small clinical study in patients with aromatase inhibitor-induced arthralgia shows that taking a specific combination product (Opera, Gam Farma), providing bromelain 20 mg, alpha-lipoic acid 240 mg, Boswellia serrata 40 mg, and methylsulfonylmethane 200 mg, daily for 6 months reduces arthralgia symptoms when compared to baseline (109570). The validity of these findings is limited by a lack of placebo control group. Further, it is unclear if these findings are due to bromelain, other ingredients, or the combination.
• Burns. Preliminary clinical research shows that topical bromelain is beneficial for burn debridement. However, it is unclear if topical bromelain is beneficial for scar prevention. Details: Preliminary clinical research and chart reviews show that gels formulated with proteolytic enzymes derived from bromelain (Debridase or NexoBrid, MediWound Ltd.), applied under an occlusive dressing for 4 hours, help debride burns, including chemical and electrical burns, in children and adults (18275,91113,103297,108149). However, only one of these studies compared the bromelain-based enzymatic debridement product to standard of care. In this study, which included surgical excision or non-surgical debridement, bromelain-derived gel decreased the time to complete debridement by 6.5 days, reduced the risk of surgical excision by 65%, and reduced the risk for autografts by 48%. However, in the long-term, there appeared to be no difference in quality of life or scarring between groups (91113).
• Cancer. Although there has been interest in using oral bromelain for cancer, there is insufficient reliable information about the clinical effects of bromelain for this condition.
• Chemotherapy-induced peripheral neuropathy. Oral bromelain has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A small clinical study in adults with chemotherapy-induced peripheral neuropathy shows that taking a specific product (Opera, Gamfarma s.r.l.) containing bromelain 20 mg, alpha-lipoic acid 240 mg, methylsulfonylmethane (MSM) 200 mg, and boswellia 40 mg daily for 12 weeks reduces overall pain when compared with baseline (96449). The validity of these findings is limited by the lack of a control group. Additionally, it is not clear if benefit is due to alpha-lipoic acid, the other ingredients, or the combination.
• Diabetes. Oral bromelain has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A small observational study in patients with a family history of type 1 diabetes found that taking a specific product (Mucos Pharma) containing bromelain 90 mg. rutin 100 mg, and trypsin 48 mg daily for 24 months is not associated with reduced incidence of type 1 diabetes at 8 years (99472).
• Diabetic foot ulcers. Although there has been interest in using topical bromelain for diabetic foot ulcers, there is insufficient reliable information about the clinical effects of bromelain for this condition.
• Exercise-induced muscle soreness. It is unclear if oral bromelain is beneficial for preventing exercise-induced muscle soreness. Details: One small clinical study shows that taking bromelain 300 mg three times daily, immediately following an intense exercise regimen, does not reduce delayed onset muscle soreness and has no effect on pain, flexibility, or skeletal weakness when compared with either ibuprofen 400 mg three times daily or placebo (10622). However, a small clinical study shows that taking a combination protease tablet containing bromelain 50 mg, trypsin 75 mg, papain 50 mg, amylase 10 mg, lipase 10 mg, lysosome 10 mg, and chymotrypsin 2 mg, four times in one day before downhill running, can improve recovery of contractile muscle function and decrease muscle soreness when compared with placebo (67838). It is unclear if these effects are due to bromelain, other ingredients, or the combination.
• Exercise-induced respiratory infections. Oral bromelain has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Preliminary clinical research in non-elite male runners shows that taking a combination product (Wobenzym Plus, Mucos Pharma) providing bromelain 540-1080 mg, rutin 600-1200 mg, and trypsin 288-576 mg daily for 3 weeks, starting one week before a marathon, does not reduce the risk of a post-race respiratory tract infection when compared with placebo (96766).
• Kidney stones (nephrolithiasis). It is unclear if oral bromelain is beneficial for kidney stone expulsion. Details: Observational research in patients with 4-10 mm kidney stones found that adding bromelain to tamsulosin is associated with a 12% increased rate of spontaneous stone expulsion when compared to tamsulosin alone (100752).
• Knee pain. It is unclear if oral bromelain is beneficial for knee pain. Details: Preliminary clinical research shows that taking bromelain (Bromelin, Lichtwer Pharma Ltd.) orally for 30 days can reduce mild, acute (duration of less than 3 months) knee pain in otherwise healthy patients when compared to baseline. A daily dose of 400 mg seems to be more effective than 200 mg daily for relieving pain, stiffness, and physical function of the knee, with reductions in symptom scores of 59% and 41%, respectively (11457).
• Lymphedema. Oral bromelain has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Some clinical research in patients who have undergone a mastectomy shows that taking a specific combination product containing bromelain, rutin, pancreatin, papain, trypsin, and chymotrypsin (Wobenzym N, Mucos Pharma) daily for 7 weeks reduces arm swelling associated with lymphedema when compared with diuretics (24560). Other preliminary clinical research in patients with primary or secondary lymphedema of the upper or lower limbs shows that taking a different combination product containing bromelain 100 mg, rutin 300 mg, and sweet clover 100 mg daily for 6 months decreases pitting, limb volume, pain, and quality of life when compared to baseline (103298). The validity of these results is limited by the lack of a control group. Additionally, it is unclear if these findings are due to bromelain, other ingredients, or the combination.
• Multiple sclerosis (MS). Oral bromelain has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A preliminary clinical study in patients with relapsing-remitting MS shows that taking an enzyme combination containing bromelain 90 mg, rutin 100 mg, and trypsin 48 mg per tablet for at least 3 months does not affect the progression of disability, relapse rate, or central nervous system lesions when compared with placebo (99468). The validity of these results is limited by the short duration of treatment.
• Ocular floaters. Oral bromelain has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A moderate-sized clinical study in patients with spontaneous symptomatic vitreous opacities (ocular floaters) shows that taking oral mixed fruit enzyme capsules containing bromelain 190 mg, papain, and ficin once, twice, or three times daily for 3 months eliminates floaters in 55%, 63%, and 70% of patients, respectively, when compared with an elimination rate of 5% with vitamin C as a control. Additionally, patients with vitreous hemorrhage-induced symptomatic vitreous opacities taking the mixed fruit enzyme capsules 3 times daily for 3 months reduced intraocular blood by 56% and improved visual acuity, but these effects were not found for lower doses and shorter durations when compared with a control (111650). It is unclear if these effects are due to bromelain, other ingredients, or the combination.
• Osteoarthritis. It is unclear if oral bromelain is beneficial for osteoarthritis. Details: A small clinical trial shows that taking bromelain 800 mg daily for 12 weeks as an adjunctive treatment for moderate to severe knee osteoarthritis is no more effective than placebo for improving symptom scores (18274). Other preliminary clinical research shows that taking bromelain 500 mg daily for 4 weeks for mild to moderate knee osteoarthritis is less effective than diclofenac 100 mg daily for improving quality of life, joint pain, and joint function (96216). However, preliminary clinical research shows that oral combination products containing bromelain can reduce pain and improve function in knee osteoarthritis (6252,91104,91106,99467,99477,103299). Bromelain 180 mg has been used in combination with trypsin 144 mg and rutin 200 mg (Phlogenzym, Mucos Pharma GMBH; Wobenzym, Mucos Pharma GmbH) three times daily for 3-12 weeks, with effects comparable to diclofenac, usually taken as 50 mg three times daily for one week, then twice daily thereafter. This product also reduces the need for rescue analgesics by 95% when compared with placebo (6252,91104,99467,99477). Other studies have used a specific combination supplement (AINAT, Laboratoire de Rhumatologie Appliquée) containing Devil's claw 600 mg, turmeric 400 mg, and bromelain 300 mg, taken 2-3 times daily for 2-8 weeks (91106) or a combination of bromelain 250 mg and papain 250 mg (Nature's Life Bromelain & Papain, NutraMarks, Inc.) twice daily, plus aceclofenac 100 mg twice daily for 6 weeks (103299).
• Pain (acute). It is unclear if oral bromelain is beneficial for acute pain. Details: A meta-analysis of 9 small clinical studies in patients experiencing acute pain due to various etiologies shows that taking bromelain slightly improves subjective pain scores and allows patients to open their mouth wider after oral operations when compared with a control (113513).
• Parturition. Although there has been interest in using oral bromelain for shortening the duration of labor, there is insufficient reliable information about the clinical effects of bromelain for this purpose.
• Periodontitis. It is unclear if oral bromelain is beneficial for periodontitis. Details: A very small clinical study in adults with periodontitis shows that taking bromelain 500 mg (Anaheal) twice daily for one week after undergoing pocket elimination surgery reduces bleeding on probing but does not improve gingival index, plaque index, or probing pocket depth when compared with placebo when assessed five weeks after surgery (111691). The validity of these effects is limited by a very small sample size and inadequate statistical power.
• Pityriasis lichenoides chronica (PLC). It is unclear if oral bromelain is beneficial for PLC. Details: A case series suggests that taking bromelain 40 mg orally three times daily for one month, then twice daily for a second month, then once daily for a third month, helps treat episodes of PLC when compared to baseline (18280).
• Postoperative pain. While evidence is mixed, some small clinical studies suggest that oral bromelain reduces postoperative pain aftersome oral surgeries. Details: Meta-analyses and clinical research in a small number of patients undergoing wisdom tooth extraction shows that bromelain modestly reduces pain for up to 8 days when compared with control (91109,91110,100750,100751). Three small clinical trials show that bromelain 160-1500 mg, taken in 3-4 divided doses daily for 4-6 days, reduces dental pain and swelling similarly to taking ketoprofen 100 mg twice daily, diclofenac sodium 25 mg four times daily, or aceclofenac 100 mg twice daily (91109,91110,110546). Additionally, a small clinical study in patients undergoing crown lengthening dental surgeries with either minimal or no bone surgery shows that taking bromelain 200 mg 1 hour before surgery and every 6 hours after surgery reduces pain during the 48-hour postoperative period similarly to ibuprofen 400 mg taken on the same schedule(113898). In contrast, several other small clinical studies show that taking bromelain does not reduce swelling or pain after wisdom tooth extraction when compared with placebo (91107,96214,96215). These studies might have not been sufficiently powered to detect a smaller effect. Meta-analyses also suggest that bromelain does not appear to have a significant effect on postoperative swelling or trismus (100750,100751). However, a more recent study in patients undergoing wisdom tooth extraction shows that taking bromelain 500 mg three times daily for 5 days reduces the severity of postoperative swelling and trismus when compared with aceclofenac, a nonsteroidal anti-inflammatory drug (NSAID) used in some European and Asian countries (110546). Bromelain, in combination with other ingredients, has also been evaluated for reducing pain after rotator cuff tear repair. Clinical research shows that taking a specific supplement (Tenosan, Agave) containing bromelain 50 mg, arginine-L-alpha-ketoglutarate 500 mg, methylsulfonylmethane (MSM) 550 mg, hydrolyzed collagen type I 300 mg, vitamin C 60 mg, and Vinitrox 125 mg daily for 3 months decreases shoulder pain, but does not improve shoulder function, in postoperative patients (19322).
• Postoperative swelling. Oral bromelain has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A small preliminary clinical study in patients undergoing surgery of the jaw shows that taking an enzyme combination of bromelain 180 mg, rutin 200 mg, and trypsin 96 mg twice daily for 5 days in addition to standard treatment reduces soft-tissue thickness (indicating the amount of swelling) at most of the nine assessed facial points when compared to control (99476).
• Rhinosinusitis. It is unclear if oral bromelain is beneficial for rhinosinusitis. Details: Several small clinical trials show that short-term and long-term use of bromelain reduces symptoms of acute and chronic sinusitis, especially nasal mucosal inflammation and edema (18276,18277,18278,18279,91105). The trials used bromelain 40 mg orally (usually the product Ananase) four times daily for six days as an adjunct to antibiotics (18276,18278,18279) or 6 bromelain tablets each containing enzymes of 500 International Pharmaceutical Federation (FIP) units for 12 weeks (91105). Bromelain is usually taken in combination with decongestants, antihistamines, and/or antibiotics. However, the studies have a number of methodological problems, and results are inconsistent. Bromelain has also been evaluated as part of a combination product. A small study in patients over 12 years old with chronic sinusitis shows that taking a combination product containing bromelain 200 mg, Boswellia serrata, black currant, and vitamin D (Flogostop Forte, Humana Italia S.p.A) 1-2 times daily for 15-30 days as an adjunctive therapy to inhaled corticosteroids modulates hyperemia of the mucosa, rhinorrhea, and local inflammation when compared with inhaled corticosteroids alone and baseline (111501). It is unclear if these findings are due to bromelain, other ingredients, or the combination.
• Sprains. Oral bromelain has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A preliminary clinical study in patients with a sprained ankle shows that taking a specific enzyme combination (Phlogenzym, Mucos Pharma) containing bromelain 90 mg, trypsin 48 mg, and rutin 100 mg, or taking different combinations of the individual enzymes three times daily for 10 days, is no more effective for relieving pain than placebo (99473).
• Tendinopathy. Oral bromelain has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Clinical research in patients with Achilles tendon insertional tendinopathy shows that taking two sachets of a specific supplement (Tenosan, Agave, Prato, Italy) containing a total of bromelain 100 mg, arginine-L-alpha-ketoglutarate 1000 mg, methylsulfonylmethane (MSM) 1100 mg, hydrolyzed collagen type I 600 mg, vitamin C 120 mg, and Vinitrox 25 mg orally for 60 days improves function and pain when compared with placebo (19321).
• Urinary tract infections (UTIs). Oral bromelain has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A small clinical trial shows that a combination of bromelain 50 mg and trypsin 1 mg (Kimotab, Mochida Pharmaceutical), taken in a dose of 8 tablets daily for 2 days, does not improve subjective symptoms of UTIs when compared with placebo (18282).
• Venous leg ulcers. Although there has been interest in using topical bromelain for venous leg ulcers, there is insufficient reliable information about the clinical effects of bromelain for this condition.
• Wound healing. It is unclear if enzymatic debridement with bromelain improves the healing of various types of chronic wounds. Details: A meta-analysis of 12 small clinical studies shows that topical bromelain reduces time to complete debridement by around 6 days but has no effect on time to healing when compared with a control (113513). However, the validity of these effects is limited by significant publication bias and a small number of studies per outcome. One small clinical study, included in the analysis above, of patients with chronic wounds related to diabetes, surgery, trauma, or venous insufficiency shows that use of bromelain-based enzymatic debridement (EscharEx, MediWound Ltd), administered as up to ten daily applications of 4 hours each, increases the incidence of complete debridement over the next 6 months to 55% of patients, compared with only 29% of those using the bromelain-free gel. However, there was no difference in changes in wound area, non-viable tissue area, or the incidence or time to complete wound closure (108148). More evidence is needed to rate bromelain for these uses.

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POSSIBLY EFFECTIVE

• Constipation. Most clinical research shows that oral inulin modestly improves stool frequency, but may not improve discomfort, in adults and children with constipation. Details: A meta-analysis of clinical research in adults with constipation shows that consuming inulin improves stool frequency by approximately 0.7 stools per week. It also seems to improve stool transit time, consistency, and hardness, but does not reduce pain or bloating (93718). Additional clinical research shows that taking a specific type of inulin (OraftiGR, BENEO GmbH) 12 grams daily in three divided doses for 4 weeks increases stool frequency by approximately one stool per week when compared with a maltodextrin control. Taking inulin also reduces the number of patients experiencing hard and lumpy stools by 13%, but does not improve symptoms of bloating, distension, physical discomfort, or gas (96850). In children aged 2-5 years, one small clinical study shows that taking a specific combination of two inulin products (Orafti P95 oligofructose and Orafti GR inulin, BENEO GmbH), 2 grams twice daily in a dairy liquid for 6 weeks, improves the softness of stools, but not pain with stooling or stool frequency, when compared with a maltodextrin control (96848). Research in older adults is conflicting. One small study shows that taking inulin 20-40 grams daily for 19 days increases the number of stools from 1-2 per week to 8-9 per week (10415). However, other preliminary clinical research in this population shows that taking a specific inulin supplement (Fibruline Instant, Cosucra Groupe Warcoing) 15 grams daily in yogurt or stewed fruit for 4 weeks does not improve bowel symptoms, stool frequency, or stool consistency (93724).
• Diabetes. Short-term use of oral inulin along with antidiabetes drugs may improve glycemic control in some patients with type 2 diabetes; however, the benefits of long-term use are unclear. Details: Two meta-analyses of clinical research in normal weight and obese patients with type 2 diabetes show that taking inulin 0.8-10 grams orally daily for 6-12 weeks reduces glycated hemoglobin (HbA1c) by 0.65% and fasting plasma glucose by 16 mg/dL when compared with control. Taking inulin also improved HOMA-IR, a measure of insulin resistance, when compared with control. Researchers did not evaluate the most effective dose of inulin; however, most studies used 8.4-10 grams daily (103198,105533). In females treated with metformin and glyburide, taking inulin 10 grams daily for 8 weeks reduces fasting blood glucose by 15 mg/dL and HbA1c by 1% when compared with placebo (93719). Population research in adults has also found that high dietary intake of inulin over 8 years of follow up is associated with a 6% lower risk of type 2 diabetes when compared with low dietary intake (110515). Inulin has also been studied in combination with other supplements. Preliminary clinical research in elderly patients with diabetes shows that drinking a milk powder product supplemented with inulin and resistant dextrin 30 grams before breakfast and 15 grams before dinner for 12 weeks decreases fasting plasma glucose by 17 mg/dL, HbA1c by 0.38%, postprandial glucose by 27 mg/dL, body weight by 0.8 kg, and systolic and diastolic blood pressure by 5 mmHg when compared with placebo (99843). Other clinical research in adults with type 2 diabetes shows that taking a specific combination product (Orafti Synergy1, BENEO GmbH), containing 50% inulin and 50% fructo-oligosaccharides, 8 grams orally twice daily for 6 weeks does not reduce body weight or caloric intake or increase satiety scores when compared with placebo (107934).
• Obesity. Oral inulin might modestly improve short-term weight loss. Additional research is needed to determine the long-term effects of inulin on weight loss and weight maintenance in overweight or obese individuals. Details: Some clinical research in overweight and obese females with diabetes shows that taking inulin 10 grams daily for 8 weeks results in weight loss of 2.6 kg, compared with no weight loss in those taking placebo (93719). Preliminary clinical research in overweight or obese patients with prediabetes shows that taking a specific brand of inulin (Orafti Synergy 1, BENEO GmbH) 30 grams orally daily for 6 weeks reduces body weight by 0.4 kg, compared with a 0.4 kg increase in those in the control group (93721). Preliminary clinical research in adults with obesity shows that taking inulin 16 grams orally daily for 3 months moderately reduces body weight and body mass index (BMI) when compared with placebo. However, these effects were most prominent in subjects that also increased physical activity (110514). Additional preliminary clinical research in adults with overweight shows that adding 18 grams of inulin powder to green tea daily increases weight loss when compared with green tea alone. Over six weeks, individuals taking inulin lost 2 kg, compared with no weight loss in those taking green tea. Weight loss was maintained for at least 2 weeks (93726). Clinical trials in children show conflicting results. In children aged 7-12 years, a small clinical study shows that taking a specific oligofructose-enriched inulin product (Orafti Synergy1, BENEO GmbH) 8 grams orally in water before one meal daily for 16 weeks decreases weight gain by 2.4-fold and attenuates an increase in BMI when compared with placebo (96847). However, other preliminary clinical research in children with obesity aged 7-15 years shows that taking inulin extract 13 grams orally daily for 6 months does not reduce body weight or BMI when compared with placebo (110598). However, other clinical research shows that taking inulin orally in combination with other ingredients might not improve weight loss. Combining inulin, chromium picolinate, capsicum, L-phenylalanine, and other nutrients with caloric reduction and exercise doesn't seem to reduce weight in moderately obese patients when compared to caloric reduction and exercise alone (7607). Another preliminary clinical trial shows that taking inulin 10 grams with maltodextrin 10 grams daily for 12 weeks does not reduce body weight or improve body composition when compared with placebo in adults with overweight or obesity following a calorie-restricted diet (103202). Preliminary clinical research in adults with obesity also shows that consuming a seafood-based dietary product fortified with inulin 1.7 grams, fish oil 370 mg (containing eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), and bifidobacterium animalis daily for 12 weeks does not lower body weight, waist circumference, abdominal fat, serum cholesterol levels, or blood pressure when compared with placebo. However, consuming the product modestly improved some markers of insulin resistance (110600).

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Alcohol use disorder. It is unclear if oral inulin is beneficial in patients with alcohol use disorder. Details: Preliminary clinical research in adults with alcohol use disorder who were recently admitted to the hospital shows that taking a specific inulin product (Fibruline, Cosucra) 4-16 grams orally daily for 17 days does not improve liver function tests when compared with placebo. Some liver function tests were also worse in those treated with inulin (110601).
• Antibiotic-associated diarrhea. Oral inulin has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Preliminary clinical research in children aged 6 months to 14 years receiving antibiotics for common infections shows that taking a combination of inulin and fructo-oligosaccharides, up to 5 grams daily depending on age, does not reduce the rate of antibiotic-associated diarrhea (93720).
• Celiac disease. Small clinical studies suggest that patients with celiac disease who take oral inulin may have a lower risk of vitamin and mineral deficiency. Details: Preliminary clinical research in a small number of children and adolescents with vitamin and mineral malabsorption due to celiac disease shows that taking a specific oligofructose-enriched inulin product (Orafti Synergy 1, BENEO GmbH) 10 grams daily for 3 months improves the absorption of vitamin D, vitamin E, and iron, but not vitamin A (99841,99842). Levels of 25-hydroxy vitamin D and vitamin E increased by 42% and 19%, respectively, compared with no significant improvements in those taking placebo (99842). Although taking inulin did not improve serum ferritin levels, it did decrease serum hepcidin concentrations by 61% when compared with baseline, while no significant improvement was reported with placebo. Hepcidin is a regulator of iron homeostasis, and increased levels are associated with iron-deficiency anemia (99841).
• Child growth. Oral inulin has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Preliminary clinical research in healthy, exclusively formula-fed, infants less than 4 months of age shows that supplementing formula with 0.8 grams/dL of a specific combination product (Orafti Synergy1, Beneo-Orafti) containing 50% inulin and 50% fructo-oligosaccharide until 12 months of age does not improve markers of child growth, including body weight, length, and head circumference, when compared with placebo. The combination product was associated with a reduced duration of fever during infectious episodes, but not with a reduction in the number of infections. It is unclear if any potential effects are due to inulin, fructo-oligosaccharide, or the combination (107937).
• Chronic kidney disease (CKD). It is unclear if oral inulin is beneficial in patients with CKD. Details: In adults with CKD, adding inulin 19 grams daily for 6 months to a low-protein diet reduces serum insulin, fasting plasma glucose, total serum cholesterol, triglycerides, and markers of systemic inflammation, while increasing serum high density lipoprotein (HDL) cholesterol, when compared with baseline (105534). However, it is unclear if similar changes occur with a low-protein diet alone, or if the rate of progression of CKD is reduced. Population research in adults has found that high dietary intake of inulin over 8 years of follow up is not associated with a lower risk of CKD when compared with low dietary intake (110515).
• Hypercholesterolemia. It is unclear if oral inulin reduces cholesterol levels in patients with hypercholesterolemia. Details: Research in patients with hypercholesterolemia has shown mixed results, with some studies showing a small decrease and others showing no improvement in serum cholesterol levels (7604,8450,10412,10413,96849). A typical dose of inulin used is 6 grams orally three times daily for up to 6 weeks (10412). A meta-analysis of healthy, dyslipidemic, overweight or diabetic patients shows that inulin reduces levels of low-density lipoprotein (LDL) cholesterol by approximately 5% (96849). Another meta-analysis of randomized clinical trials in the same population shows that taking inulin 1.5-30 grams daily for 2-12 weeks reduces LDL cholesterol levels by 7 mg/dL and increases high-density lipoprotein cholesterol levels by 2 mg/mL when compared with control. However, this meta-analysis also included data from patients treated with fructo-oligosaccharides instead of inulin (107940).
• Hypertension. It is unclear if oral inulin is beneficial in patients with hypertension. Details: Population research in adults has found that high dietary intake of inulin over 8 years of follow up is associated with a 21% lower risk of hypertension when compared with low dietary intake (110515).
• Hypertriglyceridemia. It is unclear if oral inulin is beneficial in patients with hypertriglyceridemia. Details: A meta-analysis of clinical trials in normal and moderately hyperlipidemic patients suggests that taking inulin-type fructans at an approximate average dose of 14 grams daily reduces triglyceride levels by about 15 mg/dL when compared with control (93737). However, other research, including a meta-analysis of healthy, dyslipidemic, overweight or diabetic patients shows that taking inulin 1.5-30 grams daily for 2-12 weeks does not reduce triglyceride levels when compared with control. However, these negative studies are limited by small sample sizes and inclusion of data from patients treated with fructo-oligosaccharides instead of inulin (7604,107940).
• Impaired glucose tolerance (prediabetes). Several small clinical studies suggest that oral inulin is not beneficial in patients with prediabetes. Details: Preliminary clinical research in adults with prediabetes shows that taking inulin 15 grams orally daily for 24 weeks does not improve fasting blood glucose, glycated hemoglobin (HbA1c), or lipid levels when compared with placebo. However, taking inulin modestly improved markers of insulin resistance (107938). Two other, small, clinical trials show that taking specific inulin products (Orafti Synergy 1, BENEO GmbH or Frutafit IQ, Sensus American) 10-30 grams daily for 6 weeks does not improve blood glucose, insulin resistance, glucose homeostasis, or insulin sensitivity when compared with placebo (93721,107936). However, these studies may have been inadequately powered to detect a difference between groups.
• Iron deficiency anemia. Oral inulin has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Preliminary clinical research in young adult females with iron deficiency anemia shows that taking inulin 963 mg/kg and iron supplementation orally daily for 3 months modestly improves serum hemoglobin, hematocrit, and iron levels when compared with a control group consuming iron-fortified flour (110599).
• Menopausal symptoms. It is unclear if oral inulin is beneficial in patients with hypertriglyceridemia. Details: Preliminary clinical research in adults experiencing menopause shows that consuming yogurt enriched with a specific inulin (Frutafit TEX, Sensus Company) 1.5% daily for 6 weeks moderately improves menopausal symptom scores, including depression, anxiety, and vasomotor symptoms, when compared with yogurt alone (107659).
• Nonalcoholic fatty liver disease (NAFLD). Taking oral inulin alone does not seem to improve liver transaminase levels in patients with NAFLD. Details: Preliminary clinical research in patients with NAFLD shows that taking metronidazole 400 mg twice daily for one week plus inulin 4 grams twice daily for 12 weeks reduces levels of alanine aminotransferase and aspartate aminotransferase when compared with placebo. However, when inulin is taken without metronidazole, these measures are not improved (103200).
• Polycystic ovary syndrome (PCOS). It is unclear if oral inulin is beneficial in patients with PCOS. Details: Preliminary clinical research in overweight or obese females with PCOS shows that taking specific products containing inulin (FrutaFit TEX, Sensus American) or inulin and fructo-oligosaccharides (FrutaFit IQ, Sensus American) 10 grams orally once daily for 12 weeks does not reduce systolic or diastolic blood pressure when compared with placebo. However, the validity of this study is limited by the inclusion of subjects with and without hypertension at baseline (107941). More evidence is needed to rate inulin for these uses.

(Read more about INULIN)

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Celiac disease. Although there has been interest in using oral lipase for celiac disease, there is insufficient reliable information about the clinical effects of lipase for this purpose.
• Dyspepsia. It is unclear if oral lipase is beneficial for improving symptoms of postprandial distress syndrome. Details: A small clinical trial shows that taking a specific acid-resistant lipase (Amano Enzyme USA) 280 mg immediately before a high-fat meal does not reduce postprandial bloating and nausea when compared with placebo in individuals with postprandial distress syndrome (101900).
• Inflammatory bowel disease (IBD). Although there has been interest in using oral lipase for IBD, there is insufficient reliable information about the clinical effects of lipase for this purpose.
• Prematurity. It is unclear if adding a specific form of lipase, recombinant human bile salt-stimulated lipase (rhBSSL), to infant formula improves outcomes in premature infants. Some research suggests a potential increased risk for adverse effects. Details: Human breast milk contains rhBSSL, but it is inactivated when breast milk is pasteurized for donation. Clinical research in infants born before 32 weeks' gestation shows that adding rhBSSL as 8700 units per 100 mL formula or pasteurized breast milk, for 4 weeks does not increase growth velocity, body length, or head circumference over the next 12 months when compared with formula or pasteurized breast milk devoid of lipase. However, the infants who were small for gestational age (SGA), which made up approximately 15% of the study population, grew by an additional 1.9 grams/kg daily on average when compared with placebo (101940). More evidence is needed to rate lipase for these uses.

(Read more about LIPASE)

Proteolytic enzymes represent a wide group of enzymes that are used alone or in combination. See specific monographs for effectiveness information.

(Read more about PROTEOLYTIC ENZYMES (PROTEASES))

POSSIBLY SAFE ...when used orally and appropriately. Doses up to 240 mg daily have been used safely for up to a year (6252,6253,10622,11457,18281,18284,91104,91105,91106,91111)(96449,103298). Higher doses up to 3200 mg daily have been used safely, short-term (18283,110546). ...when used topically and appropriately. Bromelain has been used safely as a debriding agent for up to 4 hours (18275,91113,103297,108148,108149,113899). Additionally, a retrospective cohort study in critically ill patients with severe burns suggests that use of bromelain as a debriding agent for up to 4 hours is not associated with a greater risk of bacteremia (113899).

PREGNANCY AND LACTATION:
Insufficient reliable information available; avoid using.

(Read more about BROMELAIN)

LIKELY SAFE ...when used orally in amounts commonly found in foods. Inulin has Generally Recognized As Safe status (GRAS) in the US (93728).

POSSIBLY SAFE ...when used orally and appropriately in supplemental doses, short-term. Doses of 8-18 grams daily have been used safely for up to 24 weeks (7604,7605,7606,7607,8451,93716,93719,93726,103200,107936,107935,107938). Also, 20 grams daily has been used with apparent safety for up to 3 weeks (96836,96850). There is insufficient reliable information available about the safety of inulin when used long-term.

CHILDREN: LIKELY SAFE
when used orally in amounts commonly found in foods. Inulin has Generally Recognized As Safe status (GRAS) in the US (93728).

CHILDREN: POSSIBLY SAFE
when used orally and appropriately in supplemental doses, short-term. Clinical studies have used doses of 3-6 grams daily for 10 days in children 3-6 years of age and 5-13 grams daily for up to 6 months in children 7-15 years of age with apparent safety (96847,110598,110602). ...when used in infant formula. A formula containing chicory fructans (Orafti Synergy1, BENEO GmbH), approximately 50% of which were inulin, has been used with apparent safety in infants for 8-12 months (93717,107937).

PREGNANCY AND LACTATION: LIKELY SAFE
when used orally in amounts commonly found in foods (93728). There is insufficient reliable information available about using inulin in medicinal amounts during pregnancy or lactation; avoid use.

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There is insufficient reliable information available about the safety of lipase.

CHILDREN: POSSIBLY UNSAFE
when recombinant human bile salt-stimulated lipase (rhBSSL) is used orally by premature infants. Adding rhBSSL to infant formula or pasteurized breast milk increases the risk for serious gastrointestinal adverse effects in premature infants (101940).

PREGNANCY AND LACTATION:
Insufficient reliable information available; avoid using.

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POSSIBLY SAFE ...when used orally and appropriately. Various proteolytic enzymes have been safely used orally in clinical research (716,964,965,968,969,6252,6253,10622,11457,18281,18284) (91104,91105,91106,91111,96449). Side effects are typically mild to moderate and most often include gastrointestinal effects. See specific monographs for more detailed information related to the safety of individual proteolytic enzymes. ...when used topically and appropriately. Various proteolytic enzymes have been safely used topically in clinical research (67835,67843,67845,91113). Some proteolytic enzymes might cause allergic reactions when used topically. See specific monographs for more detailed information related to the safety of individual proteolytic enzymes.

PREGNANCY AND LACTATION:
Insufficient reliable information available; avoid using.

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ANTICOAGULANT/ANTIPLATELET DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = High •  Occurrence = Possible •  Level of Evidence = D Bromelain may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.  Details There is one case report of a patient experiencing minor bruising while taking bromelain with naproxen (14806). Bromelain is thought to have antiplatelet activity (10639,14806,18285,18286,37234). Whether this interaction is of concern with topical bromelain is unclear. Interference with coagulation of burn wounds has been reported in a patient receiving bromelain-based enzymatic debridement. However, observational research has found that topical bromelain debridement is not associated with increases or decreases in laboratory markers of coagulation when compared with surgical debridement (110547).

TETRACYCLINE ANTIBIOTICS Interaction Rating = Minor Be watchful with this combination. Severity = Mild •  Occurrence = Possible •  Level of Evidence = B Theoretically, bromelain might increase levels of tetracycline antibiotics.  Details Laboratory research suggests that bromelain might increase the absorption of tetracycline antibiotics. However, a study in healthy adults reported no difference in tetracycline plasma levels when a 500 mg dose was taken with or without bromelain 80 mg (14296).

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ANTIDIABETES DRUGS Interaction Rating = Minor Be watchful with this combination. Severity = Moderate •  Occurrence = Unlikely •  Level of Evidence = D Theoretically, inulin might increase the risk of hypoglycemia with antidiabetes drugs.  Details Some clinical research shows that inulin improves glycemic control in patients with diabetes; however, it is unclear if it has hypoglycemic effects (93719,99843,103198).

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General ...Orally, bromelain seems to be well tolerated.
Most Common Adverse Effects:
Orally: Diarrhea, flatulence, gastric upset, headache.
Topically: Pruritus, urticaria.

Dermatologic ...Topically, bromelain may cause dermal allergic reactions including urticaria, pruritus, and skin swelling (9184). Redness, swelling, burning, pain at the application site, and cellulitis have also been reported rarely (108148,113513). In one case, a fixed drug eruption with pruritis near the groin was reported in a 33-year-old male taking bromelain 50 mg orally daily for 10 days. After discontinuation of bromelain and treatment with topical corticosteroid, the lesion resolved. Upon re-challenge with bromelain, the lesion reappeared in the same area (103300).
In another case report, a 61-year-old male with a history of chronic lower leg ulceration secondary to chronic venous hypertension and recurrent deep vein thrombosis on rivaroxaban presented with a deep-dermal burn on his lower calf. Bromelain-based topical enzymatic debridement agent Nexobrid 2 grams was applied to the burn site. Thirty minutes later, the patient experienced two instances of hemorrhage at the site of debridement. The patient was stabilized and treated with fluids, packed red cells, and tranexamic acid, and then the Nexobrid was removed (111656). Caution should be used in patients with underlying coagulopathies.

Gastrointestinal ...Orally, bromelain may cause gastrointestinal disturbances, including diarrhea, nausea, vomiting, flatulence, and abdominal pain (9184,18274,18282,96216,113513).

Immunologic ...Immunoglobulin E (IgE)-mediated allergic reactions to bromelain may occur (9184).
If inhaled, bromelain may cause sensitization and allergic reactions such as asthma (37199,37215,37233). In case reports of occupational inhalation of bromelain, additional allergic symptoms included difficulty swallowing, throat itching, eye irritation, and rhinitis (37214).

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General ...Orally, inulin is well tolerated.
Most Common Adverse Effects:
Orally: Bloating, constipation, diarrhea, flatulence, and gastrointestinal cramps.
Serious Adverse Effects (Rare):
Orally: Anaphylaxis has occurred following consumption of foods high in inulin.

Gastrointestinal ...Orally, inulin may cause flatulence, bloating, diarrhea, constipation, and gastrointestinal cramps, especially at doses over 30 grams (7604,8450,8509,93716,93721,93724,96836,96850,96851,99843)(107936,107940,107941,110602).

Immunologic ...Severe allergic reactions to inulin-containing foods have been reported. There is one report of anaphylaxis following consumption of foods with a high concentration of inulin including salsify, artichoke leaves, and margarine (7608).

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General ...No adverse effects have been reported in adults. However, a thorough evaluation of safety outcomes has not been conducted.
Serious Adverse Effects (Rare):
Orally: Gastrointestinal adverse effects, such as necrotizing enterocolitis, when recombinant human bile salt-stimulated lipase is used in premature infants.

Gastrointestinal ...Orally, when added to the formula or pasteurized breast milk consumed by premature infants, recombinant human bile salt-stimulated lipase (rhBSSL) can cause gastrointestinal adverse effects, including abdominal distension, flatulence, constipation, colic, abdominal pain, gastroenteritis, vomiting, regurgitation, and rectal bleeding (101940). Premature infants receiving rhBSSL also had a slightly higher rate of necrotizing enterocolitis (NEC) when compared with those receiving placebo. After review by a panel of experts, it was determined that the rate of confirmed or suspected NEC in infants consuming rhBSSL was 3.3%, compared with 0.5% in those receiving placebo. Although this rate of NEC is lower than the historical rate of occurrence in premature infants (11%), a possible increased risk for NEC cannot be ruled out (101940).

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General ...Orally, proteolytic enzymes are generally well tolerated. See specific monographs for detailed safety information related to individual proteolytic enzymes.
Most Common Adverse Effects:
Orally: Gastrointestinal upset.
Serious Adverse Effects (Rare):
Topically: Allergic reactions.

Gastrointestinal ...Orally, some patients taking proteolytic enzymes may have gastrointestinal complaints (101517).

Immunologic ...Proteolytic enzymes are commonly found in laundry detergents and pre-spotter products. Rarely, protease specific IgE positive tests possibly related to these products have occurred. Exposure may be airborne or topical (102705). In addition, in case reports, occupational exposure to the airborne proteolytic enzyme pepsin has resulted in allergic rhinoconjunctivitis or asthma (102706,102707).

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