Peptide is the buzzword across the entire anti-aging category. The word itself just means a short chain of amino acids — covering hundreds of molecules with hugely different functions. Three classes have meaningful skincare evidence; most of the rest are vehicles for premium pricing.
The three peptide classes that actually do something
Signal peptides
Matrixyl 3000 (palmitoyl tripeptide-1 + palmitoyl tetrapeptide-7) signals the skin to make more collagen. Best evidence base; modest visible improvement in fine lines over 12+ weeks. The Ordinary Buffet uses this combination cheaply.
Carrier peptides
Copper peptides (GHK-Cu) deliver trace copper to skin, supporting wound healing and collagen synthesis. Niod CAIS 2 is the cult product, expensive but real. The Ordinary Multi-Peptide + Copper Peptides 1% is the budget version.
Neurotransmitter-inhibiting peptides
Argireline (acetyl hexapeptide-8) supposedly relaxes muscle contractions, like a topical Botox. Effect is real but small — visible at high concentrations after consistent use, well short of injectables. The Ordinary Argireline Solution 10% delivers what's available over the counter.
What 'peptide complex' on a luxury label usually means
Brands often list 'proprietary peptide blend' without naming the molecules. Without specific peptide names, you can't evaluate the evidence. Premium pricing for unnamed peptides is a marketing tactic; specific named peptides (with concentrations, not just 'contains') are what to look for.
How peptides fit a routine
Apply peptide serums in the morning or evening, after water-based serums, before moisturiser. They don't replace retinoids or sunscreen for anti-aging — they complement them. The realistic expected effect is 'subtle, cumulative, visible after 3+ months' rather than 'transformational'.
Don't expect peptides to undo deep wrinkles. They help maintain dermal structure, slow visible loss of firmness, and support skin that's already in good condition. Existing static lines need retinoids or in-office procedures.
Picking honest products
The Ordinary Buffet
Cheap, multi-peptide, well-formulated. Best entry point.
Skinceuticals Peptide Plumping Serum
Premium price for Matrixyl-based formula. Worth it if you tolerate the spend.
Drunk Elephant Protini Polypeptide Cream
Peptides in a rich moisturiser base — convenient combination, premium price.
Peptides are a real category with real evidence, but the meaningful effects are modest and slow. If you want fast visible results, retinoids do more. Peptides are the consistent maintenance layer underneath them.