Guides
Practical guides to reading labels, understanding testing claims and comparing value.
Label basics
LABEL BASICS
How to Read a Supplement Label
Serving size, amount per serving, ingredient form, other ingredients and testing information — in the order that matters.
LABEL BASICS
Proprietary Blends Explained
What a proprietary blend is, why companies use them, and why they make comparison hard.
LABEL BASICS
Supplement Serving Size Explained
Why “per serving” can mean one capsule or five, and how that changes comparisons.
Magnesium
Testing
TESTING
What Does “Third-Party Tested” Mean?
Why the phrase alone tells you very little, and what to look for instead.
TESTING
What Does NSF Certified Mean?
NSF/ANSI 173 vs NSF Certified for Sport, and how to check a listing.
TESTING
What Does USP Verified Mean?
What USP’s verification program checks, what it doesn’t, and how to confirm a product.
Value
Creatine
Omega-3
Formats
Vitamin D