Topic

Peptides

Peptides are the category where the distance between marketing confidence and effect size is widest. The effects are real and repeatedly measured; they are also small, and the percentages on labels rarely mean what they appear to mean.

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  Label analysis

  What does 10% Matrixyl actually mean?

  The number refers to a supplier's peptide blend, not to peptide content. A look at what is really in the bottle and how peptide evidence compares with retinoids.

  15 September 2026