Cholesterol Balance by Natrol, Inc.

POSSIBLY EFFECTIVE

• Hypercholesterolemia. Most clinical research shows that oral pectin at a dose of 15 grams daily can slightly lower total cholesterol and low-density lipoprotein (LDL) cholesterol levels in patients with hypercholesterolemia. Details: While some small studies in patients with or without hypercholesterolemia suggest that pectin 1-12 grams daily for up to 12 weeks does not reduce lipid levels (2215,2217), other research in patients with hypercholesterolemia shows that taking pectin 15 grams daily for 4 weeks consistently reduces total cholesterol and LDL cholesterol by around 7% to 10% when compared with baseline or placebo (2214,2216,92473). Some forms of pectin might lower cholesterol levels better than others. Pectin with a higher molecular weight and higher degree of esterification appears to be the most effective (92473). A larger clinical study also shows that taking 20 grams of pectin and guar gum, along with small amounts of insoluble fiber, reduces total cholesterol by nearly 8% and LDL cholesterol by nearly 11%, but does not improve high-density lipoprotein (HDL) cholesterol or triglycerides, when compared with placebo (12547).

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Colorectal cancer. Although there has been interest in using oral pectin for the prevention of colorectal cancer, there is insufficient reliable information about the clinical effects of pectin for this purpose.
• Diarrhea. It is unclear if oral pectin is beneficial in children with persistent diarrhea. Details: A small clinical study in children aged 5-12 months in developing nations with persistent diarrhea shows that taking pectin 4 grams/kg reduces the duration of diarrhea and vomiting, and reduces the need for oral rehydration solution and intravenous fluid, when compared with a rice-diet control (12575). Pectin has also been evaluated in combination with other ingredients. One clinical study in children aged 6 months to 6 years with acute diarrhea shows that taking a combination of apple pectin and chamomile (Diarrhoesan, Dr. Loges + Co. GmbH) for up to 5 days reduces the frequency of stools by day 3 by about 1.36-fold when compared with placebo, with improvements maintained through day 5. This combination product was given hourly up to a maximum dose of 50 mL in children 6-12 months of age, 60 mL in children 1-3 years of age, and 80 mL in children 4-6 years of age (19705). It is unclear if these findings are due to pectin, chamomile, or the combination.
• Gastroesophageal reflux disease (GERD). It is unclear if oral pectin is beneficial in children with GERD. Details: A small clinical study in children with GERD and cerebral palsy shows that adding pectin to enteral nutrition in a 1:2 ratio for 4 weeks might reduce some symptoms of GERD. The number of vomiting episodes per week was reduced by 60% and the frequency of coughing/wheezing was reduced by 76% for children given the pectin diet when compared with those given a non-pectin diet (92476).
• Impaired glucose tolerance (Prediabetes). It is unclear if oral pectin is beneficial in patients with impaired glucose tolerance. Details: A small clinical study in middle-aged patients with impaired glucose tolerance or impaired fasting glucose shows that drinking 400 mL of a beverage containing 40 grams/L of sugar beet pectin in two divided doses daily for 12 weeks does not improve fasting or postprandial plasma glucose concentrations or serum lipid levels when compared to baseline (34118).
• Irritable bowel syndrome (IBS). Although there has been interest in using oral pectin for IBS, there is insufficient reliable information about the clinical effects of pectin for this purpose.
• Mercury toxicity. It is unclear if oral pectin is beneficial in patients with mercury toxicity. Details: A small clinical study in children with mercury poisoning shows that taking pectin 2.5 grams daily for 21 days and then 5 grams daily for 39 days increases mercury excretion in the urine, decreases the duration of mercury toxicity, and improves psychological symptoms when compared to baseline (31657). The validity of these findings is limited by the lack of a comparator group.
• Niacin-induced flushing. It is unclear if oral pectin is beneficial for the prevention or management of niacin-induced flushing. Details: A small clinical study shows that taking apple pectin 2 grams 30 minutes prior to taking niacin extended-release 1000 mg reduces the duration of flushing by about 35 minutes when compared with placebo. However, apple pectin does not reduce the incidence of flushing, the time to flush, or the maximum severity of flushing (92477).
• Peptic ulcers. It is unclear if oral pectin is beneficial for the prevention of peptic ulcers. Details: A small clinical study in patients with recently healed duodenal ulcers shows that taking apple pectin 10 grams twice daily for 6 months does not reduce the recurrence of duodenal ulcers when compared with placebo (31697).
• Prostate cancer. It is unclear if oral pectin is beneficial in patients with prostate cancer. Details: Two small clinical studies in patients with prostate cancer show that taking a specific modified citrus pectin product (Pectasol, Econugenics) 4.8 grams three times daily following prostatectomy, radiation, or cryosurgery for up to one year slows disease progression and increases the time to prostate specific antigen (PSA) doubling when compared to baseline (15020,108525). The validity of these findings is limited by the lack of a comparator group.
• Radiation exposure. Although there has been interest in using oral pectin to minimize exposure to environmental radiation, there is insufficient reliable information about the clinical effects of pectin for this purpose. More evidence is needed to rate pectin for these uses.

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LIKELY EFFECTIVE

• Familial hypercholesterolemia. Oral plant sterols are beneficial for reducing levels of low-density lipoprotein (LDL) cholesterol when used in combination with a cholesterol-lowering diet in children and adults with familial hypercholesterolemia (FH). Details: A meta-analysis of results from clinical research in children and adults with FH shows that taking plant sterols while following a cholesterol-lowering diet reduces total cholesterol by an additional 12 mg/dL and LDL cholesterol by an additional 23 mg/dL when compared with following a cholesterol-lowering diet alone (90743). Individual clinical trials in adults and children 5 years and up show that consuming margarine spreads or yogurt enriched with plant sterol 1.6-2.3 grams daily for 4-26 weeks, sometimes in combination with statin therapy, reduces total cholesterol by up to 11% and LDL cholesterol by up to 14% in patients with FH (90726,90731,35037,35106). However, most clinical research shows that plant sterols do not reduce triglyceride levels or increase high-density lipoprotein (HDL) cholesterol levels in patients with FH (35037,35106,90743).
• Hypercholesterolemia. Oral plant sterols in doses of 2-3 grams daily are beneficial for reducing levels of low-density lipoprotein (LDL) cholesterol, but not triglycerides, when used in combination with a cholesterol-lowering diet. Details: Clinical research shows that taking plant sterols, alone or in combination with plant stanols, reduces total and LDL cholesterol levels in patients with hypercholesterolemia. Taking plant sterols daily while following a cholesterol-lowering diet reduces total cholesterol by about 3% to 8% and LDL cholesterol by about 5% to 15% when compared with dieting alone (5336,5437,7105,65749,90686,90720,90722,90723,90724,90734)(90741,90748,90752,106093). Plant sterols seem to have the most significant cholesterol-lowering effect in people who naturally produce a high amount of cholesterol (90742). When taken along with statin therapy, plant sterols can lower total cholesterol by about 12-22 mg/dL and LDL cholesterol by about 11-16 mg/dL when compared with statin therapy alone (90728,96272). Predictive modeling suggests that the cholesterol reduction from plant sterols can reduce the risk of cardiovascular disease over time. In English adults with hypercholesterolemia and no cardiovascular disease, replacing regular spreads with plant sterol -enriched spreads over a 20-year period could potentially prevent 69 cardiovascular events per 10,000 males and 40 events per 10,000 females (98449). Plant sterols, usually as esters, with or without plant stanols, 0.2-9 grams daily for up to one year have been used (5336,5437,5814,7105,14298,90686,90720,35034,90722,90723)(90724,90726,90730,90732,90733,90734,90741,90742,90744,90748)(90752,96272). However, the optimal dosage of plant sterols for reducing LDL cholesterol is about 2-3 grams daily taken with meals (5814,90733,90748). At this dosage, plant sterols seem to work as well as plant stanols but less effectively than taking policosanol 5-40 mg daily (14298,90730). When taken as fortified foods, plant sterols appear to be more effective when taken in dairy products than in breads or cereals (35034). No increased benefit is seen at dosages higher than 2-3 grams daily (90744). In post-menopausal females, a meta-analysis of 6 studies shows that plant sterols are most effective for reducing total and LDL cholesterol in patients with obesity, using a daily dose of plant sterols greater than 2 grams, and duration of treatment greater than 8 weeks (112081). Additionally, some clinical research shows that plant sterols might become less effective after about 2-3 months of treatment (90726). Results from most individual clinical studies show that plant sterols do not reduce triglyceride levels in patients with hypercholesterolemia (65749,90720,90732,96272,106093,112081). However, a meta-analysis of results from 12 clinical studies shows that taking plant sterols 0.8-4 grams daily reduces triglyceride levels by 6% in patients with hypercholesterolemia (90732). This suggests that plant sterols might modestly lower triglyceride levels in some patients, but more research in larger patient populations is needed to confirm this finding. There is also some evidence showing that plant sterols prepared as ester derivatives using fish oil rather than sunflower oil, olive oil, or rapeseed oil can moderately lower triglyceride levels when compared with placebo (90739). However, this benefit is likely due to the triglyceride-lowering activity of fish oil rather than plant sterols. Taking plant sterols does not improve levels of high-density lipoprotein (HDL) cholesterol (65749,90728,90732,96272,112081).

POSSIBLY EFFECTIVE

• Coronary heart disease (CHD). The US Food and Drug Administration (FDA) has approved an authorized health claim for dietary plant sterols, when taken in doses of at least 3.4 grams daily as part of a diet low in saturated fat and cholesterol, for reducing the risk of CHD. Details: In 2010, the US FDA authorized a health claim stating that consuming at least 3.4 grams of plant sterols daily, as part of a diet low in saturated fat and cholesterol, may reduce the risk of heart disease (102365). This health claim is based on evidence showing that plant sterols can lower cholesterol levels. However, there is currently no evidence directly linking dietary intake of plant sterols with a reduced risk for developing CHD.

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Cancer. It is unclear if dietary plant sterols are beneficial for cancer prevention. Details: A meta-analysis of population research has found that the highest intake of plant sterols is associated with a 37% reduced risk of cancer when compared with the lowest intake (106084).
• Colorectal cancer. It is unclear if dietary plant sterols are beneficial for colorectal cancer prevention. Details: Population research has found that dietary intake of specific plant sterols, including campesterol, stigmasterol, or beta-sitosterol, is not associated with risk of developing colon cancer. Dietary intake of plant sterols also does not affect the risk of rectal cancer in females; however, in males, higher dietary intake of the plant sterols campesterol or stigmasterol is associated with an INCREASED risk of rectal cancer (34993).
• Esophageal cancer. It is unclear if dietary plant sterols influence the outcome of esophageal cancer. Details: In Chinese people with esophageal squamous cell carcinoma, the mortality rate does not seem to differ between those with the lowest versus the highest intake of dietary plant sterols, measured five years before diagnosis (112082).
• Gastric cancer. It is unclear if dietary plant sterols are beneficial for gastric cancer prevention. Details: Population research has found that consuming at least 82.5 mg of plant sterols daily as part of the diet is associated with moderately lower odds of developing gastric cancer when compared to those who consume less than 45.5 mg daily (34984).
• Impaired glucose tolerance (prediabetes). Although there is interest in using oral plant sterols for prediabetes, there is insufficient reliable information about the clinical effects of plant sterols for this condition.
• Metabolic syndrome. It is unclear if oral plant sterols are beneficial for metabolic syndrome; the available research is conflicting. Details: One clinical study shows that taking yogurt mini-drinks providing plant sterols 2 grams twice daily for 8 weeks reduces total cholesterol by about 16%, low-density lipoprotein (LDL) cholesterol by about 20%, and triglyceride levels by about 19% when compared with control yogurt drinks without plant sterols (90749). However, results from a much smaller study in patients with metabolic syndrome shows that taking plant sterols 2 grams daily for 8 weeks in breakfast cereal and margarine does not improve plasma lipids or other cardiovascular markers when compared with placebo foods (90745). Reasons for the discrepancy are not clear but might relate to the dose or formulation of plant sterol, or the lipid levels of the patients at baseline.
• Myocardial infarction (MI). It is unclear if dietary plant sterols are beneficial for MI prevention. Details: Population research has found that consuming approximately 340 mg of plant sterols daily is associated with a 29% lower risk of first myocardial infarction in males when compared with those who consume about 150 mg daily. However, dietary plant sterol intake is not associated with a reduced risk of first myocardial infarction in females (90740).
• Obesity. It is unclear if oral plant sterols are beneficial for obesity. Details: In Chinese adults, higher dietary intakes of beta-sitosterol, stigmasterol, and total plant sterols are inversely related to the risk of being overweight. The risk of central obesity is linked to stigmasterol intake in females, and to beta-sitosterol intake in males (112083). Preliminary clinical research in obese individuals shows that consuming rice bran snack bars fortified with a mixture of plant sterols and stanols 1.8 grams daily for 8 weeks while following a reduced calorie diet does not increase weight loss, reduce low-density lipoprotein (LDL) cholesterol, or improve blood glucose control when compared to dieting and consuming unfortified rice bran snack bars. However, the plant sterol-enriched rice bran snacks appear to decrease total cholesterol by about 10% more than unfortified rice bran snacks (90738). More evidence is needed to rate plant sterols for these uses.

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LIKELY SAFE ...when used in amounts commonly found in foods. Pectin has Generally Recognized as Safe (GRAS) status in the US (4912).

POSSIBLY SAFE ...when used orally in amounts greater than those typically found in food. Pectin 4.8 grams three times daily has been used for up to one year without serious adverse effects (12547,15019,15020,92481,108525).

CHILDREN: POSSIBLY SAFE
when used orally in amounts greater than those found in food, short-term. Pectin 4 grams/kg has been used daily for up to 7 days without reports of serious adverse effects (12575,19705).

PREGNANCY AND LACTATION: LIKELY SAFE
when used in amounts commonly found in foods. Pectin has Generally Recognized as Safe (GRAS) status in the US (4912).

PREGNANCY AND LACTATION: POSSIBLY SAFE
when used orally in medicinal amounts (12577).

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LIKELY SAFE ...when used orally and appropriately. Plant sterols have been safely used in studies lasting up to one year (35022,35037,90724,90726,90730,90732,90733,90734,90739,90742). Due to the unknown safety of plant sterol oxidation products, and the known production of these oxidation products during the heating of foods (106092), there is insufficient reliable information available about the safety of heat-treated foods containing added plant sterols.

CHILDREN: LIKELY SAFE
when used orally and appropriately. Plant sterols have been safely used in children in studies lasting for up to 6 months (35037,90722,90723,90726,90731,35106). PREGNANCY AND LACTATION: Insufficient reliable information available; avoid using.

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DIGOXIN (Lanoxin) Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = B Theoretically, pectin might reduce the absorption of digoxin, potentially decreasing its effectiveness.  Details A small clinical study shows that taking digoxin with a kaolin-pectin suspension reduces the absorption of digoxin by about 62% (2212). It is unclear if these effects are due to pectin, kaolin, or the combination.

LOVASTATIN (Mevacor) Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, pectin might reduce the absorption of lovastatin, potentially decreasing its effectiveness.  Details Case reports suggest that concomitant use of pectin and lovastatin might reduce the cholesterol-lowering effect of lovastatin, possibly due to reduced intestinal absorption of lovastatin (615).

TETRACYCLINE ANTIBIOTICS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = B Theoretically, pectin might reduce the absorption of tetracycline antibiotics, potentially decreasing their effectiveness.  Details A small clinical study shows that taking tetracycline with bismuth subsalicylate in a kaolin-pectin suspension reduces the absorption of tetracycline by about 34% (2213). It is unclear if these effects are due to pectin, kaolin, bismuth subsalicylate, or the combination.

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General ...Orally, pectin seems to be well tolerated.
Most Common Adverse Effects:
Orally: Diarrhea, gas, loose stools, and mild cramps.
Serious Adverse Effects (Rare):
All routes of administration: Allergic reactions, including anaphylaxis, in sensitive individuals.

Gastrointestinal ...Orally, pectin alone or in combination with guar gum and insoluble fiber can cause gastrointestinal adverse effects such as mild cramps, diarrhea, gas, and loose stools (12547,15020,92473).

Immunologic ...Orally and topically, pectin may cause allergic reactions in sensitive individuals. In one case, a 7-year-old boy with a history of oral allergy syndrome after consuming a pectin-containing beverage experienced anaphylaxis after taking a citrus bath containing pectin. Allergy testing confirmed sensitivity to pectin (106928).

Pulmonary/Respiratory ...The occupational inhalation of pectin dust can cause asthma (580,581,582,583,584).

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General ...Orally, plant sterols are generally well tolerated.

Dermatologic ...Acute dermatitis has been reported in a case report of a 51-year-old female who used a pharmacy-brand plant sterol supplement to lower cholesterol levels. The rash was widespread with lesions on the hands and feet and a red and swollen face. The patient was treated orally with prednisolone and topically with emollients for 2 weeks (90737). It is not entirely clear if this adverse effect was due to the plant sterol supplement or another contributing factor.

Endocrine ...Peripheral precocious puberty has been described in a 20-month-old boy who ingested about 15 grams daily of a chicken essence product containing the plant sterol avenasterol, also known as clerosterol or chondrillasterol. Signs and symptoms included elevated estradiol and testosterone levels, acne, hairiness, increased penis size, hoarse voice, and increased growth rate. These effects were reversed when the product was stopped (112084).

Gastrointestinal ...Abdominal discomfort has occurred in one child in a clinical trial of oral plant sterols (35106). Because plant sterols decrease cholesterol absorption in the gut, there is concern that they might produce some gastrointestinal symptoms like diarrhea and excess amounts of fat in the stool (steatorrhea), although these adverse effects have not been reported in clinical research.

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