Manufacturers
- Molecular Research Labs
- Molo-Cure Research, Inc.
- MOM Enterprises, Inc.
- Momentous
- Momentum
- Momentum Health Products
- Mommy Knows Best
- Mona Vie LLC (Canada)
- Monarch/MonaVie
- MONAT Global Corp
- Mondelez International
- Monnol Import Export Inc.
- Monoherb
- Monster Beverage Co.
- Monster Caps
- Monster Labs
- Monster Supplements.com
- Montana Big Sky
- Montefarmaco OTC
- Monterey Bay Nutraceuticals
- Montiff, Inc
- Monumental Nutrition
- Moon Juice
- MoonBrew
- MooreMuscle
- MoreHealth Clinical Supplements Inc.
- Morgan Pharma S.r.l
- Morgellons LLC
- Morinda, Inc.
- Moringa Source
- Morning Man
- Morningstar Minerals
- Morpheme Remedies
- Morphogen Nutrition LLC
- Morphoplex
- Morter HealthSystem
- Mosaic Nutraceuticals Corp
- Moss Nutrition
- Mother Earth Essentials
- Mother Nature
- Mother Nutrient
- Motherlove Herbal Co.
- Motiv-8 Performance Supplements
- Motovate, Inc
- Mountain Home Nutritionals
- Mountain Meadow Herbs, Inc.
- Mountain Peak Nutritionals
- Mountain Red Limited
- Moxxor, LLC
- MPM Medical Inc
- MR Supplements
- Mr. Gummy Vitamins
- Mr. Pink Collections, LLC
- MRM
- MRO MaryRuth LLC
- MS Bionic, Inc.
- MSE Pharmazeutika GmbH
- MSP
- MSquare Health Products
- MT Lotz, LLC
- Mt. Capra Wholefood Nutritionals
- Mt. Shasta Botanicals
- MTN OPS
- MTS Nutrition
- Mucos Pharma GMBH & Co
- MUD\WTR
- Murad, Inc.
- Murphy's Naturals
- Musashi
- Muscle & Strength, LLC
- Muscle Addiction
- Muscle Asylum Project
- Muscle Elements
- Muscle Excellence USA, Inc.
- Muscle Factor X, LLC
- Muscle Feast
- Muscle Fitness & More Inc
- Muscle Focus
- Muscle Fortress
- Muscle Freak Supplements
- Muscle Gauge Nutrition
- Muscle House
- Muscle Junkie
- Muscle Labs USA
- Muscle Militia
- Muscle Perfect
- Muscle Performance Regulator (MPR)
- Muscle Recovery Booster
- Muscle Research Supplements
- Muscle Science
- Muscle Torque Technologies
- Muscle Warfare
- Muscle X Edge, LLP
- Muscle-Link
- Muscle1
- Musclecore
- Muscleforce Supplements
- Musclegen Research, Inc.
- MuscleMeds Performance Technologies
- MusclePharm Corp
- MuscleSport
- MuscleTech
- MuscleX
- MuscleXLerator
- MuscleXtreme
- MusclMasster
- Mushroom Matrix
- Mushroom Mountain
- Mushroom Science
- Mushroom Wisdom, Inc.
- MVP Mega Inc
- MVStudio Products LLC
- MXI Corp
- My Body As Doctor
- My Health Offers, Inc.
- My Lean Green Coffee LLC
- My Life Inc
- My Spectrum Heroes
- My Stellar Lifestyle
- MyBite Vitamins, LLC
- MycoGenix
- MyDailyChoice, Inc.
- myDNAhealth
- Myerton Australia Pty Ltd
- MyHealthHerbals
- Mylan Consumer Health
- MyNicKnaxs, LLC
- MyoBlox
- MyoFX
- Myogenix Corp
- Myokem
- MyoPharma
- MyoRipped Laboratories
- Myoshred.com
- Myprotein.co.uk
- Myrtol 300
- Mythical Nutrition