Sports Supplement Testing

Whether you are a student or professional athlete, you may worry about what’s really in the supplements that you take. NSF’s Certified for Sport® testing program helps confirm that sports supplements and sports nutritional products do not contain substances banned by many major athletic organizations.

The NSF Certified for Sport® Program

NSF International developed this program to meet the growing demand of athletes, coaches and parents who are concerned about banned substances in sports. This independent testing program is designed to minimize the risk that a dietary supplement or sports nutrition product contains banned substances when taken at the recommended serving size.

Purpose of the Program

The program verifies that certified manufacturers and their products meet NSF's stringent independent certification process guidelines, including:

  • Product testing for banned substances and label content confirmation
  • Formulation and label review
  • Production facility and supplier inspections
  • Ongoing monitoring

Which Banned Substances Are Addressed?

NSF certifies products and inspects facilities for a range of banned substances identified by leading sports organizations, such as the National Football League (NFL), Major League Baseball (MLB), Professional Golf Associations (both the PGA & LPGA), and Canadian Centre for Ethics in Sport (CCES). NSF tests for stimulants, narcotics, steroids, diuretics, beta-2-agonists, masking agents and other substances.

Why Is Third-Party Certification Important?

Products certified by NSF conform to the highest industry standards. From extensive product testing and formulation/label review to unannounced plant inspections, NSF is the only independent testing organization to conduct a complete evaluation of every aspect of a product's production before it can earn certification. Ongoing monitoring ensures continued compliance to program requirements.

How Can I Find NSF Certified Products?

Companies that successfully complete NSF's certification program use the NSF Certified for Sport® Mark on the product label. For an up-to-date list of certified products, check the NSF online database or download the NSF for Sport app on the NSF Certified for Sport® website.

What if I Purchase a Product That Isn't NSF Certified?

You are taking a risk because there is no way to know if what’s in the product matches what’s shown on the label. Even worse, the product could contain banned substances.

For additional information about testing of sports supplements, visit the NSF Certified for Sport® website, where you can also learn more about the U.S. Anti-Doping Agency’s Supplement 411 initiative.