Certified for sport. Trusted for results.
Science-backed supplements meet elite third-party testing – with purity, potency, and confidence in every serving
Elite performance demands precision
What it takes to be NSF Certified for Sport®
At the highest level of sport, nothing is left to chance. Thorne sets a higher standard for quality with purposeful formulas, clinically studied ingredients, and rigorous testing at every step.
For athletes who demand precision, Thorne goes even further, with independent third-party testing through NSF's Certified for Sport® program.
Supplements with higher standards
What it takes to be NSF Certified for Sport®
With the most comprehensive lineup of NSF Certified for Sport® supplements for preparation, performance, and recovery, Thorne delivers certainty for athletes who demand the highest levels of quality and safety.
NSF Certified for Sport® means fewer questions about what’s in your supplement – and more confidence in how it fits into your routine. It’s a standard built for elite athletes, and a smart choice for anyone serious about showing up prepared.
Trusted by 100+ professional and U.S. National teams
Trusted by 100+ professional
and U.S. National teams
USA Triathlon
UFC
Team Penske
Unrivaled
Why our partners choose Thorne
Charles Stull, MS, RDN
Senior Director of Performance Nutrition at UFC Performance Institute
"We love Thorne because it has such a broad portfolio of NSF Certified for Sport® products that it gives us the tools to influence the key priorities of each phase of preparation."
Sophia Williams, MS, RD
Sports Dietitian at Unrivaled
"There's a clear effort to expand Thorne's NSF Certified for Sport® options in a way that's intentional and aligned with performance, especially for women's health. From a performance nutrition standpoint, having access to third-party tested products we trust allows us to focus on implementation and consistency."
Jrue Holiday
Professional Basketball Player
"I take Thorne and I trust it so much because they're NSF Certified for Sport®. As a professional athlete being tested so many times a year, having that clean product is so important."
How does a supplement become NSF Certified for Sport®?
How does a supplement become NSF Certified for Sport®?
The first step is for NSF to inspect and certify each manufacturing facility for Current Good Manufacturing Practices (cGMP). To maintain certification, each facility is audited twice yearly.
The NSF Certified for Sport® mark validates that the supplement contains none of the nearly 300 substances banned from competition by major athletic organizations, such as WADA and USADA.
Once a supplement is manufactured, NSF independently tests every batch before it can be sold to consumers with the NSF Certified for Sport® mark.
The NSF Certified for Sport® program ensures that the supplements you take to optimize your performance at every stage of athletic competition have been independently tested for quality and safety.
A supplement with the NSF Certified for Sport® mark has been independently tested to verify that the ingredients listed on the label are present in the product, in the amounts stated.
Certification by NSF helps both professional and recreational athletes make safer decisions by choosing supplements that are cleaner, safer, and more trustworthy.
