Zeal Naturals · Collagen

Collagen Peptides Unflavored

“Dosed like they actually read the research. Buy with confidence.”

Honest & effective · score 91/100

evidence: high certainty — 1 tier-A source

earned by 24% of products

solid, transparent formula

Graded better in Collagen

Per-ingredient breakdown

serving: 11-22 g (1 or 2 scoops)
A 2400×1260 PNG — post it natively, no screen recording.

Source: Manufacturer / NIH DSLD · Label last checked 2026-07-26 · verified

Drafted from NIH DSLD label 276900, UPC X0024ME8K1, label entry date 2022-10-24. Auto-mapped by import-dsld.mjs; confirm rows against the panel before splicing.

This grade is a ceiling: it assumes the label is accurate. Laboratory testing can only lower it.

Supplement formulas change. This verdict reflects the label data on file as of its source date. Always confirm against the physical label before you buy. Unsold grades formulas, not brands — and we're not doctors. This is information, not medical advice; check with a qualified healthcare professional before changing what you take.

UNSOLD

Deterministic supplement grading. Same label in, same verdict out — no accounts, no affiliate links, nothing to sell you. Grades formulas, not brands. Not medical advice.