Supplement Labels, Decoded
Label Lab reads Supplement Facts panels and certification programs so you don't have to guess. We do the protein-per-dollar math, flag amino-spiking red flags in ingredient lists, explain isolate vs concentrate label ranges, and decode what NSF Certified for Sport, Informed Sport, and USP Verified each actually test. This is informational label analysis, not health advice — we never make dosage, treatment, or efficacy claims.
Most "best protein powder" lists sell a flavor opinion. We start from the label: a "proprietary blend" line hides individual ingredient amounts by design, a nitrogen-based protein test can be inflated by cheap amino acids, and a "GMP" claim on the front of a tub is a facility-practices statement, not a finished-product test. Pick a topic below — each page leads with the specific number or fact that changes how you read a label.
The Protein Label Numbers
Our named dataset: protein-per-dollar math, isolate vs concentrate ranges, amino-spiking red flags, and the certification decoder — CSV download, versioned.
1 page →
Reading a Label
Step by step: where the real numbers live on a Supplement Facts panel, and which front-of-package words are regulated vs marketing.
3 pages →
Amino Spiking & Blends
What amino spiking is, how to spot it on an ingredient list, and whether 'proprietary blend' wording is hiding anything.
4 pages →
Certification Decoder
NSF Certified for Sport vs Informed Sport vs USP Verified vs plain GMP — what each program actually tests, and how to verify a claim yourself.
2 pages →
The named dataset
How we work
We're a research-based site: we read Supplement Facts panels, FDA labeling regulations, and certification programs' own published standards and public databases (NSF, Informed Sport/LGC, USP) rather than testing products in a lab ourselves. We report what a label and a certification program state, and do arithmetic on cost and content — never a health-outcome, dosage, or treatment claim. Read our full methodology →