They are everywhere now. But do they work?
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| Have you noticed how skin care products containing peptides are becoming more common? These short chains of amino acids tell your skin to produce more collagen and other structural proteins. That signaling effect is well-documented. What’s less clear is whether any specific peptide-packed product delivers on its promise of smoothing out wrinkles and generally rejuvenating your appearance.
Today, we get under the skin of peptide science and look at the products our reviewers actually recommend. |
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It’s peptide time,
Tim Snaith
Newsletter Editor, Healthline
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Written by Tim Snaith
April 22, 2026 • 3 min read |
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| What peptides actually do (and what they don’t)
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| The drugs making weight loss and diabetes headlines — semaglutide, sold as Wegovy and Ozempic, and tirzepatide (aka Mounjaro and Zepbound) — are both peptides. So is insulin. And so are some of the ingredients in the face cream on your bathroom shelf. |
| A peptide is simply a short chain of amino acids, the building blocks of proteins. The body constantly produces them, and they act as molecular signals that tell cells what to do. Ozempic and its cousins mimic GLP-1, a gut hormone, to manage blood sugar and appetite. The peptides in skin care products signal skin cells to produce more collagen. |
| Collagen is the protein that keeps skin firm and plump, and it's made up of long peptide chains. The body produces less collagen each decade after about age 25, which is why the skin thins and lines appear over time.
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| You can’t just rub collagen on your face and replace what's lost — the molecule is too large to absorb through the skin. But peptides are small enough to get in and do the work of nudging skin cells to produce more collagen and elastin, the proteins that keep skin smooth and springy.
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| Some peptides signal the skin to produce more structural proteins, while others deliver minerals, such as copper, to deeper layers, where they support collagen production and repair. One type slows the enzymes that break collagen down after sun exposure, while another relaxes the tiny muscles behind expression lines. These peptides explain why language like “Botox-like” is used for some products, though the effect is much milder than botulinum toxin, and dermatologists tend to push back on it.
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| The research on topical peptides is promising but uneven. A 2015 review found that copper peptides (GHK-Cu) and Matrixyl can reduce visible signs of aging when used consistently. Formulation is everything, as peptides need to sit on the skin to work. A serum or moisturizer will do something a face wash can’t. |
| Practical things worth knowing: |
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