What is NSF Certified for Sport? Tested Supplements for Athletes

Justin Fields, Professional Football Player and C4 Athlete

What is NSF® Certified for Sport®?

Certified for Sport® is a program created by NSF® to certify that what is on the label is in the bottle, and that product does not contain unsafe levels of contaminants, banned substances, or masking agents – this is especially important for professional athletes. The Certified for Sport® program verifies that products do not contain any of the 280 substances banned by the major athletic organizations.

The Certified for Sport® certification is recognized by the United States Anti-Doping Agency (USADA), Major League Baseball, and the National Hockey League.

Gio Reyna, Professional Soccer Player and C4 Athlete

NSF® Certified for Sport® Requirements

To get the Certified for Sport® certification, there are key steps that must be taken, these include:

1) Good Manufacturing Practices (GMP) Registration: GMP registration validates that a product is made, packaged, and stored in a facility that is audited twice a year for quality and safety that follows federal regulation GMPs for dietary supplements

2) Product Contents Tested and Certified: NSF experts evaluate product contents. This step involves testing the finished product to ensure what is in the product matches what is on the label, the product is free of contaminants (think microbiological, heavy metals, pesticides, and herbicides). This step also involves ongoing testing and evaluation of a product to ensure it stays compliant.

3) Certified for Sport® Certification: In this step, product lots are tested to ensure they are free from 280 banned substances. The NSF® team continuously monitors newly banned substances to stay on the forefront of banned substance testing.

What This Means For You?

The NSF® Certified for Sport® certification provides all types of consumers the peace of mind to make safer decisions when choosing supplements. This certification program is trusted by major sporting bodies and considered essential for many athletes, coaches, dietitians.

C4 & Cellucor NSF® Certified for Sport® Products

While all our products are made in the same GMP facilities as our NSF® Certified for Sport® products, which means they must adhere to the same quality and safety principles, we have a specific line-up of products specifically made for athletes. Our Sport series of products proudly wear the NSF® Certified for Sport® certification.

C4 Sport: With ingredients for explosive energy, strength, and performance - and proudly wearing an NSF® certification, C4 Sport Pre-Workout is the choice of athletes both on and off the field.

C4 Sport Ripped: With ingredients that support elevated energy, fat burning, and cellular hydration - and proudly NSF® Certified for Sport®. C4 Ripped Sport Pre-Workout is the choice of athletes both on and off the field.

BCAA (Branched Chain Amino Acids) Sport: As the perfect choice for all-day hydration and recovery, BCAA Sport Hydration Powder has been the go-to for athletes both on and off the field. With a blend of BCAAs (Branched Chain Amino Acids), amino acids, and electrolytes alongside incredible flavors plus an NSF® Certified for Sport® certification, BCAA Sport continues to raise the bar with every scoop.

Whey Sport: As a perfect all-in-one post-workout solution, Whey Sport Protein Powder is the go-to for athletes seeking a delicious high-quality protein powder with added ingredients for strength & performance. With incredible flavors and an NSF® Certified for Sport® certification, Whey Sport is the choice of athletes of all types - both on and off the field.

C4 SuperSport: Pre-workout is supercharged to help drive your performance. With ingredients to support energy, hydration, and increased strength and power, C4 SuperSport helps you reach your goals – wherever they take you!


XTEND Sport: Featuring 7G BCAAs, a robust blend to support hydration, and proudly wearing the NSF Certified for Sport® certification, XTEND Sport is the perfect solution for athletes both on and off the field. It's no wonder that XTEND has been the go-to recovery choice for athletes, lifters, and fitness fanatics for over a decade.