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Peptides in Skincare: How They Firm and Repair Skin

Peptides appear on the ingredient list of countless "firming" and "repairing" products — but what do they actually do? Far from marketing fluff, peptides are among the most useful supporting actives in modern skincare. Here's how they work and why your skin benefits. What are peptides? Peptides are short chains of amino acids — the building blocks of proteins like collagen and elastin that give skin its structure. Applied to the skin, certain peptides act as messengers, signaling skin cells to carry out useful tasks such as producing more collagen or reinforcing the barrier. What peptides do for your skin...