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BlogQuality3rd Party Supplement Testing: Third-Party Tested Supplements Certification Explained
Not all supplements are created equal. For this reason, it’s essential to consider purchasing high-quality supplements from trusted sources. Whether you’re an individual looking for a supplement that doesn’t contain animal-sourced ingredients, a competitive athlete in need of sport-compliant supplements free of banned performance-enhancing drugs and ingredients, or you simply want peace of mind that your supplements are manufactured according to strict quality standards, third-party certifications can help guide you and your integrative healthcare practitioner in the decision-making process.
Read on to learn more about third-party certifications and some of the most common certifications you may encounter when shopping for third-party certification supplements.
Many third-party certification bodies routinely test supplements or raw materials and inspect manufacturing processes to ensure a product meets a set of defined quality standards.
What Are Third-Party Certifications?
Third-party certifications are independent programs offering inspections and testing of manufacturing sites, raw materials, and finished products of various consumer goods, such as food, beverages, and dietary supplements. A manufacturer may choose to utilize a third-party certifier’s services to provide unbiased verification of their product’s quality. There are dozens of third-party certifiers in North America, each establishing a set of standards that a manufacturer must meet for their product(s) to bear a seal of approval from the certifier. (4)
Third-party certified products typically display supplement certification seals for each acquired certification directly on the product’s label to help consumers make informed decisions. Manufacturers may also provide information on their website regarding any certifications they have acquired. (4)
The Food and Drug Administration (FDA), which regulates various products such as food, cosmetics, supplements, and pharmaceutical drugs, doesn’t verify the contents of dietary supplements, and therefore many third-party certifiers are responsible for confirming the accuracy of a product’s label. Many third-party certifiers conduct routine site inspections and test finished products to ensure the supplements contain each ingredient included on the supplement facts label.
Why is this important? Consumers depend on products being accurately labeled. Accurate labeling is essential for consumers who have allergies to certain ingredients or for those taking other supplements or medications that may interact with unlisted ingredients. (13) Certain populations, such as competitive athletes, also rely on accurately labeled products, considering that banned performance-enhancing ingredients may be found in some low-quality dietary supplements. (3)
Adulterated dietary supplements have become an increasingly concerning issue, making it even clearer the importance of selecting supplements with strict quality standards. According to a 2018 analysis of FDA supplement warnings between 2007 and 2016, unapproved pharmaceutical ingredients were found in over 700 supplements, particularly in products marketed for sexual enhancement, bodybuilding, or weight loss. (10)
Did you know? According to the Food Allergen Labeling and Consumer Protection Act of 2004, supplement manufacturers must disclose the presence of any major allergens in their product, including milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, and soybeans. (13)
2. Strength
Manufacturers are required to include information on the supplement facts label indicating the amount per serving of any active ingredients. Some third-party certifiers test finished products or batches to ensure that the strength, concentration, weight, and/or measure is accurately listed on the label. Having precise information is necessary because it influences serving sizes and dosages for supplements. Furthermore, inaccurate labeling may affect a product’s expected efficacy. (14) For example, if a vitamin D supplement states it contains 500 IU but only contains half that amount, you may not experience the same benefits as you would if the supplement truly contained the advertised amount.
3. Purity
Third-party dietary supplement testing can determine whether a product is free of contaminants, such as heavy metals, bacteria, or pesticides. (4) Poor quality control can increase the risk of contamination. (6) To prevent the unnecessary introduction of these potentially harmful contaminants into their products, manufacturers may utilize third-party certifiers to perform routine inspections and evaluations of their various manufacturing practices. These inspections can ensure that manufacturers are maintaining safe and sanitary operations. (17)
Did you know? One investigation demonstrated that four out of five products pulled from the shelves of major retailers such as GNC, Target, Walgreens, and Walmart didn’t contain any of the herbs listed on the supplement’s label. (9)
Supplement Regulation: What You Need to Know
Supplements manufactured and sold in North America are regulated by government authorities and must meet specific quality standards.
Supplement Regulation in the United States
In the United States, the FDA regulates dietary supplements and their labels under the Dietary Supplement Health and Education Act (DSHEA) of 1994. It’s important to note that dietary supplements are held to much less rigorous standards than pharmaceutical drugs; in fact, the FDA does not review dietary supplement products for safety or effectiveness before they are available for purchase by consumers. Instead, manufacturers are responsible for ensuring that their products are safe to use before they’re marketed. (16)
Manufacturers are also required to produce supplements in accordance with current Good Manufacturing Practices (cGMP). Sometimes referred to as GMP, cGMP is a registration program and set of standards enforced by the FDA. (17) The program provides independent audits for manufacturers and distributors of various products, including food, beverages, cosmetics, pharmaceuticals, and supplements. Products displaying a cGMP seal confirm that the manufacturer complies with all standards, procedures, and documentation regarding its identity, strength, purity, and more. (12)
Third-party certified supplements often display logos or seals on their label.
Common Third-Party Certification Programs for Dietary Supplements
Outlined below are some of the most common third-party certifications utilized by supplement manufacturers in North America.
1. Certified Gluten-Free
If you avoid gluten, the naturally occurring protein found in wheat, barley, and rye, selecting products bearing a Certified Gluten-Free certification mark can help reduce your risk of exposure. According to a 2014 ruling by the FDA, a product cannot be Certified Gluten-Free unless it contains less than 20 parts per million (ppm) of gluten. 20 ppm is considered the safe threshold for individuals who must avoid gluten, such as those with celiac disease. (7)(18) Through routine manufacturing site inspections and product sampling, the FDA ensures that Certified Gluten-Free products are accurately represented and safe to consume. (18)
2. NSF
The National Sanitation Foundation, most commonly referred to as NSF, is an independent certification program that grants its seal of approval to products meeting purity standards. NSF certifies products in accordance with NSF/ANSI 173, an American National Standard that sets strict standards for the ingredients used in dietary supplements. NSF evaluates products for unacceptable levels of contaminants, such as heavy metals (e.g., lead, arsenic), pesticides, and herbicides. Additionally, NSF tests products to confirm that their label accurately displays all ingredients and that the product is compliant with cGMPs. (3)
NSF also certifies sport-safe dietary supplements for competitive athletes. The NSF Certified for Sport certification process routinely tests products to confirm that they are free of contaminants, masking agents, and over 270 substances banned by major athletic organizations. (3)
3. USP
U.S. Pharmacopeia (USP) is a large independent quality evaluation program used to evaluate supplement and pharmaceutical drug quality. Products bearing a USP seal must conform to all USP standards, including:
Identity: The supplement contains all ingredients indicated on the label.
Potency: The potency of the product indicated on the label is accurately represented.
Purity: The supplement is free of contaminants and unlabeled ingredients.
Performance: The supplement dissolves, which allows the body to absorb the active ingredients.
To maintain USP certification, manufacturers must undergo routine site and product inspections. USP also performs random testing of off-the-shelf products displaying their seal. (19)
4. USDA Organic
Supplements, as well as food and beverages, displaying the USDA Organic certification must contain at least 95% organic ingredients according to the United States Department of Agriculture. Certified organic ingredients are grown and processed in accordance with federal requirements that outline standards for numerous factors, including soil quality, pest and weed control, use of additives, and livestock care practices. (11)
Did you know? Ingredients must be grown without prohibited fertilizers, pesticides, or herbicides for a minimum of three years before harvesting to become eligible for organic certification. (11)
5. Non-GMO Project Verified
Non-GMO Project Verified is a voluntary third-party evaluation program used to designate food, beverages, and dietary supplements free of genetically modified ingredients (GMOs). Products undergo an independent evaluation and continued annual product verification process to ensure they don’t contain GMOs to obtain certification. (8)
6. International Fish Oil Standards
International Fish Oil Standards (IFOS) is a set of quality standards specific to fish oil supplements. To become IFOS-certified, omega-3 fish oil products must be analyzed for purity and label accuracy, including testing dietary supplements for contaminants such as heavy metals, dioxins, and polychlorinated biphenyls (PCBs). For increased transparency, results for all products tested by IFOS are published online. (2)
7. Certified Vegan
Certified Vegan is a registered trademark used to specify foods and supplements free of animal products and animal by-products, including meat, fish, poultry, eggs, milk, honey, insects, and sweeteners filtered with bone char. Use of the trademark is voluntary and manufacturers must first certify their product(s) by providing detailed documentation that outlines the sources of all raw materials. Additionally, manufacturers must provide documentation that describes the manufacturing processes involved in producing the product, which is then evaluated by the Vegan Awareness Foundation. (20)
Third-Party Certifications Help You Make Informed Decisions
In addition to choosing high-quality supplements from reputable sources, third-party certifications, such as Certified Gluten-Free, NSF, or USP, can help you make informed decisions. If you’re a patient, the best first step before purchasing dietary supplements is to speak to your integrative healthcare practitioner. They can help determine which high-quality supplement products are right for your preferences and wellness plan.
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The information in this article is intended for healthcare practitioners for educational purposes only, and is not a substitute for informed medical, legal, or financial advice. Practitioners should rely on their own professional training and judgement, and consult appropriate legal, financial, or clinical experts when necessary.
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