Dietary Supplement Safety

  • Overview
  • Benefits of Certification
  • Why Work With NSF?
  • Certification Process
NSF Certified Supplements bottle

NSF has worked for over a decade with sports organizations, anti-doping agencies and supplement manufacturers to help ensure supplement safety through product testing and evaluation.

NSF facilitated the development of the only American National Standard for dietary supplements (NSF/ANSI 173) and with NSF certification you can be sure that dietary supplements do not contain unacceptable levels of contaminants.

Benefits of Certification

The NSF mark

Certification helps consumers and health care practitioners to identify high-quality and reliable dietary supplements and helps your company:

  • Gain a marketing advantage by demonstrating the quality of your products
  • Assure consumer safety by using outside expert contaminant testing
  • Confirm regulatory acceptance by verifying your manufacturing consistency and accuracy

By using NSF's product certification services, you not only receive our premier services but also the benefit of placing our highly recognized NSF mark on your product labels. Your company and customers benefit from the recognition and integrity associated with NSF International.

Why Work With NSF?

Business people shaking hands

In addition to our expertise in dietary supplement testing and certification, we offer an extensive range of co-marketing services to support your product launches, promotions and ongoing marketing campaigns. Services include:

  • Guidance on the use of the NSF mark on your product labels, advertising, and other promotional and marketing collateral
  • Trade show tools that help you communicate your certification to a wider audience
  • Communications expertise to assist in the development of press releases and educational materials

When working with NSF, you partner with the only accredited third-party certifier of dietary supplements, functional foods and raw ingredients (ANSI-Accredited Product Certification Body - Accreditation #0216). Our highly trained technical staff, auditors and project managers will help you through the auditing, certification and training process.

Certification Process

Supplement pills

The NSF certification process includes:

  • A toxicology and label review to verify product formulation and marketing claims
  • A formulation review to identify and quantify dietary ingredients declared on the product label
  • Contaminant testing to ensure that no unsafe levels of contaminants are present
  • A Good Manufacturing Practices (GMP) facility inspection

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  • Open What is NSF product certification?

    In addition to offering GMP facility audits, NSF can test and certify dietary supplements to NSF/ANSI Standard 173. Product certification helps assure consumers that your company’s supplements are not only manufactured using GMPs, but that they meet label claims and are free of any potentially harmful contaminants.

  • Open Why should you obtain product certification?

    For end-consumer confidence in your product!  NSF product certification verifies that a supplement’s contents actually match what is printed on the label.  It also ensures the product does not contain undeclared ingredients and that unacceptable levels of contaminants are not present in the supplement.

  • Open What does the certification process include?

    The certification process includes a toxicology label and formulation review to identify and quantify dietary ingredients declared on the product label, a contaminant screen, testing of declared supplement facts panel label claims, lab testing to ensure the product does not include unsafe levels of contaminants, and a good manufacturing practices (GMP) facility inspection.

  • Open How often do the products have to be tested?

    After a product is initially NSF certified, it will be tested for both contaminants and label claims on an annual basis, after a full annual toxicological review of the product formulation and label.  NSF auditors also review the formulations and labels during the annual GMP audits to assist the manufacturer with updating NSF formulations, if necessary, when compared to batch records.

  • Open What do you typically test for?

    All products are tested for contaminants such as heavy metals, aflatoxins, a micro screen, disintegration (for tablets and capsules) and pesticides (for products that include botanicals). Oils may be tested for rancidity, and marine products need PCB/dioxin testing on the marine oil.  All products are also tested by NSF toxicologists for supplement fact panel label claims, based on the number of active ingredients.

  • Open What is the best way for me to obtain pricing information?

    Email our team at

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