We use Google Analytics to see which articles get read. You can accept or decline analytics cookies. See our Privacy Policy.
Signal peptides, carrier peptides and growth factors — separating the mechanism from the claim.
5 articles
Peptides get sold as everything from 'Botox in a bottle' to a collagen cure-all. They're a broad category, not one ingredient — and what they can actually do depends entirely on which peptide you mean.
Read article
Of all the peptides sold on anti-ageing claims, copper peptides (GHK-Cu) have the strongest research behind them — genuine wound-healing evidence, and cosmetic trial data that's real but more modest than the marketing suggests.
Read article
The same active ingredient can work brilliantly or do almost nothing depending on the pH it's formulated at — a distinction most product labels never mention.
Read article
Copper peptides and Matrixyl have genuine clinical evidence behind them. 'Topical Botox' peptides mostly don't. Here's a category-by-category audit of what the research actually supports, and why in vitro results can't be trusted at face value.
Read article
One number quietly decides whether an ingredient can physically reach your skin at all. Here's what the 500 Dalton rule actually means for hyaluronic acid, collagen, peptides, and every 'deep penetration' claim on the shelf.
Read article