Peptides are everywhere right now. Serums, supplements, injectables, TikTok explainers, every "future of skincare" list this year. If you've felt a little skeptical about jumping on the bandwagon... same.

Let's actually unpack what peptides are, why the hype is happening, whether the "your body stops making its own" concern holds water, and how you can harness nature's own skin signalers without a lab in sight.

What, Exactly, Are Peptides?

Peptides are short chains of amino acids - the same building blocks that make up proteins like collagen and elastin. Think of amino acids as letters and peptides as short words: each one carries a specific instruction for your cells. In skin, different peptide types send different messages. Some tell fibroblasts to produce more collagen, some help calm inflammation and support repair, and others relax the tiny muscle contractions that form expression lines.

Your skin makes peptides on its own constantly. The catch is that this natural production slows down with age, sun exposure, and stress.

Inside your body, peptides are made through gene expression - DNA copied into RNA, ribosomes reading that RNA to link amino acids together in the right order. The peptides in skincare, on the other hand, are almost always built in a lab through a process called solid-phase peptide synthesis, where amino acids are added one at a time in a controlled, repeatable sequence. It's the same basic building blocks but with a very different assembly line.

Why Everyone's Suddenly Obsessed

A few things are converging at once.

They're gentler than the mainstream alternatives. Compared to retinoids - which can bring redness, peeling, and sun sensitivity - peptides are generally well tolerated and layer easily into routines without an adjustment period.

The results are visible without being invasive. Certain peptides are being marketed as a "Botox-in-a-bottle" alternative, not because they're equivalent, but because they support firmness and smoothness without needles.

And wellness culture loves a "signal" story. The idea of telling your cells what to do fits neatly into a broader moment obsessed with biohacking and cellular optimization.

Where the Hype Gets Ahead of the Science

This is the part most peptide marketing skips - and it's worth sitting with before you buy in.

1) Getting in is the hard part. Peptides are relatively large, water-loving molecules, and skin's outer layer is built specifically to keep molecules like that out. Research on topical peptides consistently flags penetration as the main limiting factor. A peptide in a jar and a peptide reaching your fibroblasts in an active form are two different claims.

2) "Peptide" isn't one ingredient. The category splits into several types with very different jobs: signal peptides that prompt collagen production, carrier peptides that ferry trace minerals like copper, enzyme-inhibitor peptides that slow collagen breakdown, and neurotransmitter-inhibitor peptides that aim for a Botox-like effect. Marketing often borrows the best-supported evidence for one well-studied peptide to imply the whole category is equally effective.

3) A lot of the "clinical" evidence is industry-funded and small. Most human evidence comes from company-sponsored cosmetic trials rather than independent, large-scale research. A lot of the strongest-sounding data measures something different from a visible result on your face. That doesn't mean peptides don't work - it means "clinically proven" often carries less weight than the phrase implies.

None of this means peptides are a scam. It means the honest version of the pitch is: a promising, still-maturing ingredient class with real but modest and unevenly proven effects. Not "the future of skincare, guaranteed."

The "Depletion" Question: Is It Founded?

This one is worth being precise about, because the concern isn't baseless - it's just aimed at the wrong category of peptide.

The depletion worry is real for certain systemic, hormone-mimicking peptides - things like injectable growth-hormone-replacement therapies, where flooding the body with an external version of a hormone can dial down the body's own feedback loop over time. That's a legitimate, well-documented phenomenon.

Topical skincare peptides are a different story. They work locally, signaling to fibroblasts that are already there, rather than replacing a hormone in a body-wide feedback loop.

The "your skin will forget how to make its own collagen" narrative doesn't have solid evidence behind it for topical use. It's a real concern from one category of peptide being applied to a completely different one, where the mechanism doesn't transfer.

The Part We Actually Love: Nature Already Figured This Out

Here's the thing. You don't need a lab-synthesized peptide to send your skin a "make more collagen" message. Nature has its own signaling system... and it's one we've been using to formulate your favorite LSF skincare all along.

• Virgin hazelnut oil - the base of our Elasticity Serum - is naturally rich in vitamin E and has been shown to help support collagen production, improve elasticity, increase hydration, and fade hyperpigmentation.
• Coenzyme Q10 - the hero of our Antioxidant Serum is a naturally fermented nutrient that fuels skin cells' own repair energy. Research has linked it to increased collagen gene expression in skin fibroblasts, along with improved hydration and reduced wrinkle depth.
• Goat's milk in our moisturizer carries naturally occurring alpha hydroxy acids, including lactic acid, that gently exfoliate and smooth skin, alongside vitamins A and D that support skin repair and turnover.
• Rosehip fruit oil and sea buckthorn fruit oil, both in our Antioxidant Serum, come from fruits naturally high in vitamin C and carotenoids - nutrients your body needs as cofactors to actually synthesize collagen. Sea buckthorn specifically has been shown in wound studies to support collagen synthesis at the tissue level.
• Argan oil is rich in vitamin E and antioxidants that help protect skin from oxidative stress and support healthy cell turnover.
• Perilla seed oil, rich in omega-3 alpha-linolenic acid, has documented anti-inflammatory and antioxidant properties that help calm redness and support the skin barrier.

Pair the Elasticity Serum and Antioxidant Serum with our Goat's Milk Moisturizer - something a lot of our customers already do, morning and night - and you've essentially built your own signaling routine, just sourced from a hazelnut orchard and a rose bush instead of a lab.

This isn't "peptides are bad." It's that the underlying goal everyone's chasing - better cellular communication, more collagen, calmer repair - has more entry points than the current hype cycle suggests. Botanicals doing this work isn't a consolation prize. It's often the original blueprint peptide science is trying to imitate.

Where That Leaves Us

We're not rushing to add peptides to our lineup - not because we think they're dangerous, but because ingredients like hazelnut oil, CoQ10, goat's milk, and rosehip are already doing this signaling work, with a story we can stand behind fully. If peptides continue to prove out with more independent, long-term research, that's worth revisiting.

For now, we'd rather lean into what nature - and our own farm - has already spent a long time perfecting. 💛

This post is for general information and isn't medical advice. If you're considering systemic or injectable peptide therapies, that's a conversation to have with a licensed healthcare provider.

References

1. Bachem, "Peptide Synthesis: How Are Peptides Made?", on natural peptide biosynthesis versus solid-phase peptide synthesis. ↩ ↩2

2. Frontiers in Medicine, "Oral and topical peptides for skin aging: systematic review and meta-analysis of randomized controlled trials"; and "Acetyl Hexapeptide-8 in Cosmeceuticals: A Review of Skin Permeability and Efficacy", PMC, on stratum corneum penetration limits for topical peptides. ↩

3. Gorouhi F, Maibach HI, "Role of topical peptides in preventing or treating aged skin", International Journal of Cosmetic Science, on the four categories of cosmetic peptides. ↩

4. FormBlends, "Best Skin Peptides (2026): Evidence-Ranked Guide", on effect sizes and the balance of industry-funded versus independent evidence for cosmetic peptides. ↩ ↩2

5. Healthline, "Hazelnut Oil for Skin: 9 Benefits and Uses", on vitamin E's role in collagen support and skin elasticity. ↩

6. Lain ET, et al., "The Role of Coenzyme Q10 in Skin Aging and Opportunities for Topical Intervention: A Review", Journal of Clinical and Aesthetic Dermatology; and Mine Y, et al., "Stimulatory effects of collagen production induced by coenzyme Q10 in cultured skin fibroblasts", PubMed. ↩

7. Healthline, "Goat Milk: The Skin Care Ingredient You Have to Try", on lactic acid (AHA) and vitamin content in goat's milk. ↩

8. Healthline, "12 Benefits and Uses of Argan Oil", on argan oil's antioxidant compounds and effects on skin. ↩

9. Oargă Porumb DP, et al., "Unveiling the mechanisms for the development of rosehip-based dermatological products: an updated review", Frontiers in Pharmacology; and Upadhyay NK, et al., "Mechanism of Wound-Healing Activity of Hippophae rhamnoides L. Leaf Extract in Experimental Burns", PMC, on sea buckthorn and collagen synthesis at the wound site. ↩

10. Ahmed HM, "Health effects of omega-3,6,9 fatty acids: Perilla frutescens is a good example of plant oils", PMC. ↩