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Tested to Be Trusted

Tested to Be Trusted

You have standards. So do we.

We require third-party laboratory testing of all vitamins and supplements. It’s our commitment to you and your family.

To know if a product’s been tested, check for a supplement facts panel.* You’ll know that the label says is what you get.

What's in your supplement

Check mark

The vitamin or supplement needs to contain the dietary ingredients and the amount per serving listed in the center of the Supplement Facts Panel.* We also test for gluten if a “gluten free” claim is made.


The Other Ingredients listed below the box are not confirmed. (Marked with an X in the example shown here.)

back of pill bottle with check mark on Supplement Facts and X over other ingredients.

What's not in your supplement:

Products must be tested for specific identified harmful contaminants and must not exceed set standards.

These include:


These heavy metals can't exceed the current NSF/ANSI 173 Standard:

  • Inorganic arsenic
  • Cadmium
  • Chromium (VI)
  • Mercury
  • This heavy metal can't exceed the FDA Toxic Elements Working Group Interim Reference Level (IRL):

  • Lead


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.

Microbiological components

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.

Known adulterants

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.

How it's made

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.

Meet the third-party testing experts.

These industry leaders ensure the vitamins and supplements we sell meet our high standards. And they'll continue to verify the quality of products bearing these seals.*

Verified Active Ingredients
United States Pharmacopeia

*about third-party testing: A product sample is tested by an independent third party for certain contaminants and, whenever possible, the identity and potency of dietary ingredients. Dietary supplements must contain the amounts declared on the finished product label in compliance with the Dietary Supplement Health Education Act (“DSHEA”). Excludes pet supplements, products only sold at Navarro locations, and other products that may be dispensed by the pharmacy. Supplements that are part of a home test kit in limited stores are also excluded. Tests performed on a single lot of the vitamin or supplement. As a result, we cannot confirm that subsequent lots would pass these tests.

*for probiotic testing: Probiotic items are tested to ensure the colony forming units (CFU) count of each strain of live microorganism is present at the time of production.