NSF Contents Certified
Truth in every label
NSF Contents Certified verifies that the supplements and functional foods and beverages you rely on contain what they claim—nothing less, nothing misleading. Through rigorous independent testing, NSF confirms ingredient identity, verifies label accuracy, screens for key contaminants and conducts ongoing facility audits to help ensure products continue meeting certification requirements over time. Built on recognized standards and science-based protocols, it’s a higher level of assurance for modern wellness products.
If it’s on the label, it’s in the product
Products in this category, with complex formulations, intricate supply chains, globally sourced ingredients and lofty product claims can be difficult to evaluate. NSF Contents Certified helps bring clarity and confidence to every purchase.
Know what you’re taking
Supplement and active nutrition labels don’t always tell the full story. NSF verifies ingredient identity, presence and amounts when applicable and ensures labeling accurately reflects product contents.
Choose with confidence
With thousands of supplements, functional beverages and nutrition products on the market, certification provides a clear, trusted signal that a product has been independently verified, not just self-reported by the brand.
Reduce hidden risks
NSF tests products for contaminants and other quality concerns based on ingredient and category risk, including toxic elements, harmful microorganisms, mycotoxins, pesticides, undeclared substances and adulterants where applicable.
Trust that lasts
Certification is not a one-time event. NSF conducts annual audits and periodic retesting to help ensure certified products continue meeting requirements over time.
See which products are
Contents Certified
You will find the NSF certification mark on many of the world's most well-loved brands, some you likely already use. To find NSF Certified products, visit our database, select Nutrition & Wellness, then choose Dietary Supplements or Functional Food & Beverages and search by brand.