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Dietary Supplement News

Our Supplements Are NSF® Certified – Why You Should Care

Choosing safe supplements is a big deal, but Theralogix makes it easy.
Written by the Theralogix team of Registered Dietitians
Choosing safe supplements is a big deal, but Theralogix makes it easy. NSF® certification is your best guarantee of content accuracy, purity, good manufacturing practices, and overall safety.

You’ll find the mention of testing, certification, and NSF® International all over the Theralogix website. What does it all mean? Is it really that big of a deal?  

Absolutely. Theralogix strives to offer safe, evidence-based supplements for all, and NSF certification is a huge reason we’re able to do just that. Read on to learn more about NSF International and why you should care that our supplements are NSF certified.  

What is NSF International?  

NSF International is a not-for-profit organization focused on public health and safety. They develop public health standards, rigorous product tests, and certifications for the food, water, and consumer goods industries.   

Why does Theralogix work with NSF International?  

Dietary supplements aren’t regulated in the same ways as medication. While medications require rigorous testing before they hit the market, dietary supplements don’t. In most cases, they aren’t required to go through any testing at all. And without testing and certification, there’s no guarantee that your product has what it claims on the supplement facts label or that it is free of harmful contaminants.  

That’s a little alarming when you consider how many people take dietary supplements on a daily basis. Dietary supplement use has been on the rise in recent years, and the latest data from the Council of Responsible Nutrition (CRN) revealed that supplement use has reached an all-time high. As of 2021, 80% of Americans take at least one dietary supplement. 

NSF International developed the nation’s very first independent testing and certification program for dietary supplements in 2003, and it remains a global leader in this arena today. Theralogix works closely with NSF to give our customers peace of mind, and all eligible products proudly bear the NSF mark on their label.  

What does the NSF mark really mean?  

It takes a lot to be worthy of the NSF seal – it’s not just one test and done. NSF certified products undergo regular testing to make sure they maintain strict standards of quality and safety. Check out a few benefits of choosing a product certified by NSF. 

1. Content accuracy.  

Some supplements may contain a dose that’s higher or lower than their label claim, may contain ingredients that aren’t listed on their label, or may not even contain what they claim to offer.  

The NSF mark means that what’s on the supplement facts label matches what’s in the bottle. It ensures that the product contains the nutrients it claims to provide in the amounts listed on the supplement facts panel.  

2. Purity.  

Several studies have analyzed dietary supplements and shown that heavy metal (mercury, lead, arsenic, cadmium, etc.), bacterial, or fungal contamination is not uncommon. Most people take dietary supplements to benefit their health, but the benefit vanishes if they’re contaminated with harmful substances. Products that bear the NSF mark are tested to make sure they’re free of harmful contaminants, leaving you with a pure, trusted product.  

3. Good manufacturing practices.  

Theralogix products are manufactured in an NSF registered Good Manufacturing Practices (GMP) facility.  

If you can’t trust the manufacturing process, you can’t trust the finished product. GMP regulations help manufacturers create a safe product from the very start by sourcing quality ingredients, maintaining consistency throughout the manufacturing process, protecting products from adulteration, and preventing mix-ups and errors. NSF regularly audits its certified manufacturing facilities, ensuring that GMPs are followed. 

What about the NSF Certified for Sport ® mark? Is that different than the NSF mark?  

Some consumers may have additional concerns beyond the assurance of the standard NSF mark. The Certified for Sport ® program helps athletes, dietitians, coaches, and consumers around the world make safer decisions when choosing dietary supplements. This program still tests for content accuracy and purity, but goes above and beyond to ensure that products that display the Certified for Sport mark are free of prohibited athletic substances, masking agents, and other undeclared ingredients.

In fact, NSF screens these supplements for 280 substances banned by most athletic organizations and tests every single batch before it hits the shelves. Certified for Sport is the only independent third-party certification program recognized by the United States Anti-Doping Agency (USADA). 


Choosing safe supplements is a big deal, but Theralogix makes it easy. NSF certification is your best guarantee of content accuracy, purity, good manufacturing practices, and overall safety.

You’ll find the NSF certification mark proudly displayed on our dietary supplements, assuring you with just one glance that our products are among the best. Whether you’re looking to support your immune health, fertility, athletic recovery, or overall health, know you can turn to Theralogix for products you can trust.