Peptides Promise Better Skin, Fuller Hair, and Better Health. But Do They Actually Work? - Oprah Daily

The beauty and wellness world has turned us into amateur chemists on a first-name basis with ingredients once spoken about only in laboratories and dermatology offices. Our latest obsession: peptides. They’re showing up in topical serums and hair-growth formulas and as injectables, capsules, and nasal sprays. They seem to be the fix for whatever ails you, be it aging skin, hair loss, lousy sleep, poor digestion, a dragging sex drive…the list is long, and the possibilities sound thrilling. But how safe is it to slather them on our skin or shoot them into our bloodstream? If you’re curious about peptides (hard not to be) but unclear on how they work or where to potentially dive in, this is your road map.

What are peptides, exactly?

“Peptides are short chains of amino acids, the same building blocks that make up proteins in your body,” says Amanda Kahn, MD, a board-certified internist and longevity expert. “Their small size allows them to move through the body and attach to receptors on cells. Once attached, they instruct your body to do something it already knows how to do but isn’t always motivated to do, like accelerate tissue repair, reduce inflammation, or generate more growth hormone.” Peptides can also ramp up collagen production, influence cellular energy pathways, and regulate appetite (more on those peptides, GLP-1s, below). “But rather than forcing change, they are more like reminders or nudges that help restore or optimize natural processes,” says Dr. Kahn. Why are these nudges necessary? Because the body makes many peptides on its own, but production levels and responsiveness can change with age and health status. In theory, products formulated with synthetic or plant-derived peptides can make up the differences.

Are they really the second coming for skin?

Peptides have become the darlings of skin care because research shows that they improve skin quality and how skin functions long term, vs. creating a temporary youthful effect. “They’ve been studied for years, but now we have better formulations, sophisticated delivery systems that help them penetrate skin, and a clearer understanding of how to use them effectively,” says Whitney Bowe, MD, a board-certified dermatologist who formulates with peptides in her own skin care brand. Different peptides have different jobs; here are some major players.

- Signal peptides are messengers that tell cells within the skin to produce more collagen and elastin—i.e., the proteins that support structure and elasticity and keep skin firm and smooth. One to look for is Matrixyl, which is palmitoyl pentapeptide-4.

- Carrier peptides transport minerals into the skin cells. The most utilized—and most researched—ones are copper peptides (specifically a version called GHK-Cu), which speed wound repair, calm inflammation, and buffer environmental stress.

- Neurotransmitter-inhibitor peptides interfere with muscle contraction to soften expression lines (think weaker, needle-free Botox). Acetyl hexapeptide-8, often referred to as Argireline, is one example.

- Enzyme-inhibitor peptides block enzymes that break down collagen and elastin. Common ones include peptides derived from rice, soybeans, and silk.

Keep in mind, you won’t see instant results. “Instead of forcing the skin to turn over rapidly, like more aggressive ingredients, peptides gently guide the skin to behave in a healthier way,” says Dr. Bowe. You’re playing the long game, says Nicolas Travis, founder of the skin care brand Allies of Skin: “Peptides reward those who use them diligently and daily.” Yes, you’ll probably see small improvements in a few months, but the real reward is in keeping your skin strong and healthy for decades. “So many of my patients come in saying they feel like they ‘aged overnight,’ ” says Dr. Bowe. “It’s because their skin’s support structure has weakened, which shows up as fine lines, wrinkles, sagging, and loss of elasticity. Peptides address all that.”

What can peptides do for thinning hair?

“In the scalp, certain peptides can signal hair follicles to stay active, stimulate growth factors, improve blood flow, and create a healthier environment for hair growth,” says Mona Gohara, MD, a board-certified dermatologist. “In general, they optimize existing follicles rather than create entirely new ones. Like coaches, they encourage the follicle to keep performing at its best.”

Because hair grows slowly, results take time. But in the long run, it can get stronger and fuller. “Peptides can also help minimize hair shedding by reducing some of the inflammatory and environmental stressors that contribute to hair loss,” says Dr. Gohara, who considers them just one part of a comprehensive plan: “They tend to work best alongside other approaches, including addressing nutritional deficiencies, hormonal factors, and scalp health, and using evidence-based treatments such as minoxidil when appropriate.”

What about peptide injections for wellness? Am I missing out?

Health-focused peptides weren’t on the general public’s radar until GLP-1 drugs like Ozempic hit the mainstream a few years ago and overhauled how we think about obesity and weight loss. Those meds (which also include Wegovy and the GLP-1/GIP Zepbound) are lab-made versions of our body’s naturally occurring peptide hormone and are designed to mimic its ability to lower blood sugar and make us feel full. But weight management was just the start. Now, your grandpa is injecting different peptides into his achy knees, and your neighbor claims she’s found a peptide that’s solved her insomnia. “Peptides can be prescribed for metabolic health, tissue repair, sleep, recovery, body composition, cognitive clarity, and healthy aging,” says Koehl Robinson, founder of CeliaRx, a telehealth company that prescribes therapeutic peptides under physician guidance and medical oversight. Similar digital health hubs, like LVLUP Health, Mino, and RegenMD Wellness, and wellness spas across the country are also prescribing peptides to answer the demand. “A large portion of patients are healthy individuals looking to optimize how they feel and function,” says Dr. Kahn.

Here are the peptides most commonly prescribed today:

- BPC-157 for recovery and gut health. “It’s often used to support healing, whether from injuries, inflammation, or gut issues,” says Dr. Kahn.

- TB-500 (often paired with BPC-157) is meant to help mobility, flexibility, and connective tissue repair.

- GHK-Cu (also found in skin care) can potentially help with collagen production, tissue regeneration, and hair health, and tame inflammation.

- Semax and Selank can support focus and stress resilience, proponents say.

- Sermorelin and Ipamorelin are designed to stimulate the body’s own growth-hormone signaling, often for sleep, recovery, and body composition.

Many of these peptides have to be injected because they don’t survive digestion. While weight-loss drugs may come with auto-injecting pens, some health peptides are shipped to your door in a glass vial, and you draw your prescribed dose into a syringe and inject it just under your skin. Frequency varies; people inject them daily, weekly, for 10 days straight, or just twice a year—it all depends on your doctor’s protocol and the type of peptide you’re using.

Before you jump on the bandwagon, though, you need to know the risks. “I don’t prescribe them,” says double-board-certified endocrinologist and internist Caroline Messer, MD. “There’s basically no human research on them. No one knows the long-term effect on humans, and they’re completely unregulated.” She adds that sourcing is a legitimate concern. Questionable products can be sold online by random unvetted companies, which raises alarms about purity, dosing accuracy, and contamination. “They’re marked with ‘not for human use’ in small letters on the packaging, although sometimes that’s been torn off,” Dr. Messer adds. “And they can be laced with MDMA [ecstasy or molly], caffeine, arsenic, or lead.”

This is why it’s imperative to see a licensed medical professional who sources peptides from licensed pharmacies rather than, say, listening to an influencer who promotes a DIY route.

Are there other ways to take peptides?

“Certain smaller or specially formulated peptides can work orally, particularly those designed to act locally in the gut,” says Dr. Kahn. The most familiar example is collagen peptides—yes, the ones the juice bar scoops into your Strawberry Skin Smoothie. (In addition to acting as signaling molecules, these hydrolyzed protein fragments function as building material to bolster collagen. Clinical studies have reported improvements in skin elasticity, hydration, wrinkle appearance, and hair thickness with consistent use.) BPC-157 is also sold in capsule form for gut support and recovery because it may work directly in the gastrointestinal tract. Then there are nasal sprays, which “can be effective for certain peptides, especially those intended to act on the brain or central nervous system, because the nasal pathway can bypass some of the usual barriers,” says Dr. Kahn. “However, absorption can be inconsistent, and dosing is less precise compared to injections.”

Can you rev up the existing peptides in your body?

If you don’t want to sniff, drink, or inject anything but you do want benefits, here’s some good news: Research suggests that your gut bacteria can influence the release of some peptide hormones your body already makes, including GLP-1. One of the most studied bacteria is Akkermansia muciniphila. “Think of your microbiome as a manufacturing plant: Akkermansia feeds on what you eat and releases a protein signal called P9, which tells your body to turn on GLP-1,” says Colleen Cutcliffe, PhD, cofounder of Pendulum Therapeutics, one of the few consumer companies offering live Akkermansia and publishing clinical research on its strains. Akkermansia may have a similar effect on PYY, another gut peptide involved in appetite regulation. More broadly, healthy gut bacteria can improve the gut’s barrier function and immune defense while calming inflammation. “When taking Akkermansia, many people experience improvements in GI symptoms, and interestingly, we’ve also seen improvements in areas like stress,” says Adam Perlman, MD, Pendulum Therapeutics’ chief medical officer. There’s even an emerging gut-peptide connection to muscle health. Spindle Muscle+ is a postbiotic made with pasteurized Akkermansia. The brand’s Akkermansia MYO strain is formulated specifically for muscle health, with clinical research showing improvements in muscle strength.

As the research on peptides continues, it’s best to remain cautiously optimistic: Yes, they should be a key ingredient in your skin and scalp routine; dermatologists recommend them. But injections are best navigated with a doctor as your guide. Their promise is real, but so is our need for patience, as the science catches up to the enthusiasm.

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