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Ingredient Receipt · Antioxidants

Peptides

INCI: Palmitoyl Pentapeptide-4, Acetyl Hexapeptide-8, Copper Tripeptide-1 (and many others)

Peptide serums promise firmer skin. A plain-English look at signal, carrier and “Botox-like” peptides, and how thin the evidence still is.

A line of clear connected beads suggesting a peptide chain, beside a droplet
Illustrative image

01 · In plain English

Peptides are short chains of amino acids. Skincare peptides are marketed as messengers that tell skin to make collagen.

02 · What it does

Peptides are grouped roughly as signal peptides (said to stimulate collagen), carrier peptides (e.g. copper peptides), and neurotransmitter-inhibiting peptides (marketed as topical “Botox”).

A review of topical peptides found some promising small studies but noted most were short, small and often funded by manufacturers. Whether peptides penetrate well enough to act as claimed is still debated.

03 · Who it’s for

  • People who want a gentle, low-irritation addition to an anti-aging routine.

04 · What the evidence says

  • Modest improvement in the look of fine lines in small studies.limited evidence

05 · Myths, checked

  • ““Botox in a bottle” peptides relax wrinkles like injections.”

    Topical peptides haven’t been shown to work like neurotoxin injections.

    insufficient evidence

06 · Insufficient evidence

  • Specific peptide claims backed only by in-house manufacturer data.

07 · How to use it

  • In a serum or moisturizer, once or twice daily. Generally well tolerated.

08 · Pairs well / go carefully

Pairs well with

  • Retinoids, sunscreen and moisturizers, which have stronger evidence.

Go carefully with

  • Nothing specific.

The Receipt

  1. 01Gentle and plausible; the receipt is mostly small and manufacturer-led. Sunscreen and retinoids still come first.

Education, not a diagnosis. If something changes quickly, hurts, bleeds, or worries you, see a dermatologist.

Sources (1)
  1. Gorouhi F, Maibach HI. Role of topical peptides in preventing or treating aged skin. Int J Cosmet Sci. 2009.

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