Swan fat. In ancient Rome, women who wanted a remedy for wrinkles used swan fat in hopes of restoring their skin’s youthful elasticity. And they used crocodile dung to try to glow up their skin.
While most women today would turn their noses up at the anti-aging remedies used in the ancient world, they are still just as interested in products that can keep their skin looking young. And one of the top products women are turning to today is collagen powder that includes peptides.
While there are those who believe the recent hype around using collagen powder for anti-aging and other wellness goals is unjustified, experts in the peptide industry say there is evidence that the protein in collagen peptides can help women look younger longer. The key is knowing what products are truly effective and what to realistically expect.
“In my experience, the people who get the most out of collagen peptides are women in their late thirties and beyond who are starting to notice changes in skin texture, nail brittleness, or joint comfort,” Karthik Achari, Clinician and Founder of PepMD, recently told The Flow Space. “The reason is pretty simple. Natural collagen production starts declining in your thirties and drops off more quickly after menopause when estrogen falls. Supplementation helps bridge that gap.”
PepMD is the first private accreditation and credentialing body purpose-built for peptide medicine. Achari founded PepMD in 2026 to address the rapid growth of peptide medicine without the infrastructure needed to support it. Modeled in part after established accreditation systems like The Joint Commission, PepMD credentials clinicians, recognizes pharmacies, and authorizes research sites under a single, unified standard. Achari also founded Pure Rx, a pharmaceutical infrastructure company, where he identified firsthand the need for greater accountability and consistency in the peptide and GLP-1 landscape. His work focuses on bringing structure, credibility, and oversight to an evolving sector that has outpaced traditional regulatory frameworks.
Am I taking a risk by taking collagen peptides?
Today’s media is full of reports of the dangers of peptide use. A recent article from The Guardian on the “injectable peptides craze sweeping the US” warned that people using peptides are “turning themselves into lab rats.” An April 2026 article in Glamour gave a similar warning, saying users of injectable peptides are “essentially guinea pigs for an unregulated substance.”
While those using injectable proteins should pay close attention to the reports, those using collagen peptides don’t have the same worries. While both types leverage the same biological building blocks, the way they are delivered makes a difference in their impact.
“When people hear peptides today, they’re usually thinking about the kind of peptide therapeutics making headlines, such as GLP-1s, BPC-157, and sermorelin,” Achari says. “Those are injectable, prescription-grade compounds that work through specific receptor signaling. Collagen peptides are a completely different category. They’re protein fragments you swallow, and they work by giving your body the amino acid building blocks it uses for skin, hair, nails, and connective tissue.”
Collagen peptides are short chains of amino acids that come from hydrolyzed collagen, usually sourced from cow, fish, or pig. They’re sold as oral supplements, typically in powder or capsule form, and they’re regulated as dietary supplements rather than drugs.
“Both the powdered collagen products and the injectables are technically peptides because they’re amino acid chains, but the way they’re sourced, regulated, and used is night and day,” Achari explains. “I think that distinction is worth holding onto because the marketing language tends to blur it.”
What can I really expect a collagen supplement to do for me?
Shop for a collagen peptide supplement, and you’ll typically encounter claims that the products will deliver healthier skin, among other benefits. The information provided online for Vital Proteins Collagen Peptides Advanced, for example, says they help “support healthy hair, skin, nails, bones and joints.”
But there are caveats. With Vital Proteins, the fine print says results come “in combination with resistance training.” It also says the product is not intended to “treat, cure, or prevent any disease.” Experts say there is evidence that users will see improvements, but only in certain areas.
“The evidence for peptides providing anti-aging effects is strongest for skin, joints, and nails,” Achari told The Flow Space. “Randomized trials in postmenopausal women have shown improvements in skin elasticity and dermal collagen density after a few months of daily oral collagen. For joints, there’s reasonable evidence in mild osteoarthritis and exercise-related joint discomfort. Nail growth is the most consistent thing patients tell me they notice. The evidence is weaker on the other claims you’ll see marketed, such as gut health, hair growth, and weight management. There’s some emerging data on each, but I wouldn’t say any of it is settled yet.”
In the end, women who turn to collagen peptides to improve their skin health will likely find them valuable. But those expecting it to stop aging in its tracks will be disappointed. The key to using peptides effectively is embracing the science without falling for the hype.
“Collagen peptides aren’t going to slow aging or fix anything that’s really about hormones, sleep, or systemic inflammation,” Achari says. “They’re useful for what they actually do, but they’re not a cure-all. And a lot of the marketing oversells what’s realistic.”