Products must be tested for specific identified harmful contaminants and must not exceed set standards.
These heavy metals can't exceed the current NSF/ANSI 173 Standard:
Products that claim to contain botanical ingredients can't contain pesticides exceeding the current NSF/ANSI 173 standard. Compounds tested are based on those suggested by the United States Department of Agriculture (USDA) National Organics Program document USDA-NOP-2611-1.
Products are tested for certain microbiological contaminants in accordance with the current NSF/ANSI 173 standard.
Microbiological activity — aerobic plate count, yeast and mold — must be within current allowable limits. The presence of certain microbial pathogens, including salmonella, E. coli, S. aureus and enterobacteriaceae are also tested to confirm compliance to the standard.
Dietary supplements shall not contain aflatoxins at levels greater than 20 parts per billion.
Industrial contaminants in fish oil
When ingredients and products contain natural fish oil, manufacturers must have controls in place to screen for polychlorinated biphenyls (PCBs), polychlorinated debenzo-para-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and dioxin-like PCBs. The amount of total PCBs is in accordance with the current NSF/ANSI 173 standard.
Products designed for weight loss or sexual enhancement are evaluated to ensure that they do not contain known adulterants. Adulterants selected are based on the guidance listed in NSF 306, the NSF International Athletic Banned Substance Screen standard.
"Free from" claims
Any gluten-free claims made on the packaging of a dietary supplement are verified following Food and Drug Administration (FDA) standards. Gluten-free products must be less than 20 parts per million gluten.
Our suppliers are required to manufacture products in facilities that are registered with the FDA. We ensure our suppliers follow good manufacturing practices because how vitamins and supplements are made can impact what's inside.