Do peptide hair serums actually make hair thicker and fuller?
Quick answer
The creator describes diffuse hairline thinning and is using a topical peptide serum containing Redensyl, Procapil, caffeine, and GHK-Cu as a self-directed intervention. These ingredients have preliminary cosmetic efficacy data but no regulatory approval as treatments for hair loss conditions, and the pattern of thinning she describes warrants evaluation for underlying causes such as hormonal imbalance, nutritional deficiency, or telogen effluvium before attributing it to a condition addressable by topical peptides alone. No clinical guidance, timeline, or diagnosis is present in the video.
Our take · Written by FormBlends editorial team · Reviewed by FormBlends Medical Team· This is not a transcript. It is our independent review of the video above.
What did @mooseysmom22 actually say?
The creator says she ordered The Ordinary Multi-Peptide Hair Serum after a recommendation from someone named Nina Poole, who claimed it contains "the same two patented ingredients" as a more expensive thinning-hair product, plus caffeine. She says she's been losing hair around the hairline and is expecting results, telling viewers to "watch the magic." No timelines, no dosing instructions, just enthusiasm and a promise to report back.
To be fair, she isn't making specific medical claims. She doesn't say it will regrow hair or treat a condition. The word "magic" is colloquial. But 1.1 million viewers are watching someone buy a product based on a second-hand review of a different product's ingredient list, and that chain of evidence deserves scrutiny.
Does the science back this up?
Partially, but the evidence is weaker than the excitement suggests. The Ordinary's Multi-Peptide Hair Density Serum contains Redensyl, Procapil, and AnaGain, alongside caffeine and GHK-Cu (a copper peptide). These are real actives with real, if limited, data behind them.
Redensyl targets hair follicle stem cells and showed a 17% increase in hair growth in a small industry-funded study. Procapil, a blend of biotinoyl tripeptide-1 and apigenin, showed a 121% increase in hair anchorage in another manufacturer-sponsored trial, though these numbers come from the ingredient supplier, not independent researchers. A 2022 review in the Journal of Cosmetic Dermatology (Patel et al.) noted that peptide-based topicals show early promise for androgenetic alopecia but that most trials are small, short, and funded by the companies selling the ingredients.
Caffeine has more independent backing. Fischer et al. (2007, International Journal of Dermatology) found that topical caffeine penetrates the hair follicle and counteracts the inhibitory effects of DHT on hair growth in vitro. That's meaningful, but in vitro is not your bathroom mirror.
What did they get wrong (or right)?
The "same two patented ingredients" framing is where things get slippery. The creator is repeating a third-party claim she can't verify, and neither can we without knowing which expensive product Nina Poole was reviewing. If the comparison is to something like Revela or Nioxin, the ingredient overlap may be real, but "same ingredients" doesn't mean same formulation, same concentration, or same delivery system. Those details matter enormously in topical efficacy.
She gets credit for one thing: she isn't claiming this is a medical treatment. She's not telling viewers to stop seeing a dermatologist. The language stays in cosmetic territory, which is where this product legally and scientifically belongs.
What she gets wrong is the implied certainty. Phrases like "watch the magic" and "it's really good for" that area of hairline thinning set an expectation the evidence doesn't support. Hairline thinning in women has multiple causes, including hormonal shifts, telogen effluvium, and traction alopecia. A peptide serum addresses none of those root causes.
What should you actually know?
If you're losing hair around your hairline, the first question isn't which serum to buy. It's why the hair is falling out. A dermatologist can run a simple panel to check ferritin, thyroid function, and androgen levels, all of which can drive the pattern she's describing. Spending money on a topical before knowing the cause is putting the cart before the horse.
That said, The Ordinary's serum is inexpensive, generally well-tolerated, and contains actives that have at least plausible mechanisms. GHK-Cu in particular has a reasonable evidence base as a peptide that may support follicle signaling (Gorouhi and Maibach, 2009, International Journal of Cosmetic Science). It is not a replacement for minoxidil or finasteride, both of which have decades of controlled trial data behind them, but as an adjunct or a low-risk starting point for someone with mild concerns, it's not a waste of money.
The bigger issue here is the recommendation chain. A creator buys something because a reviewer said it matches another product's ingredients. That's not a clinical opinion. That's a game of telephone with your hairline.
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The human peptide GHK-Cu in prevention of oxidative stress and degenerative conditions of aging
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Effects of glycyl-histidyl-lysine-Cu on wound healing
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The creator describes diffuse hairline thinning and is using a topical peptide serum containing Redensyl, Procapil, caffeine, and GHK-Cu as a self-directed intervention.
FormBlends verdict
The creator describes diffuse hairline thinning and is using a topical peptide serum containing Redensyl, Procapil, caffeine, and GHK-Cu as a self-directed intervention. These ingredients have preliminary cosmetic efficacy data but no regulatory approval as treatments for hair loss conditions, and the pattern of thinning she describes warrants evaluation for underlying causes such as hormonal imbalance, nutritional deficiency, or telogen effluvium before attributing it to a condition addressable by topical peptides alone. No clinical guidance, timeline, or diagnosis is present in the video.
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What it helps with
- The creator describes diffuse hairline thinning and is using a topical peptide serum containing Redensyl, Procapil, caffeine, and GHK-Cu as a self-directed intervention. These ingredients have preliminary cosmetic efficacy data but no regulatory approval as treatments for hair loss conditions, and the pattern of thinning she describes warrants evaluation for underlying causes such as hormonal imbalance, nutritional deficiency, or telogen effluvium before attributing it to a condition addressable by topical peptides alone. No clinical guidance, timeline, or diagnosis is present in the video.
- Redensyl, one of the serum's key actives, showed a 17% hair growth increase in a small trial, but that trial was industry-funded and has not been independently replicated.
- Topical caffeine has the most independent evidence in this formula: Fischer et al. (2007) showed follicle penetration and DHT-counteracting effects in vitro, though human regrowth data is still thin.
What it may miss
- It may not cover eligibility, contraindications, medication interactions, lab history, or dose escalation.
- Compound access, legal status, and product quality still need a separate safety check.
- Social video captions rarely show the full evidence base behind a claim.
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Start provider reviewWhat You'll Learn
- Redensyl, one of the serum's key actives, showed a 17% hair growth increase in a small trial, but that trial was industry-funded and has not been independently replicated.
- Topical caffeine has the most independent evidence in this formula: Fischer et al. (2007) showed follicle penetration and DHT-counteracting effects in vitro, though human regrowth data is still thin.
- GHK-Cu (copper peptide) has plausible follicle-signaling mechanisms per Gorouhi and Maibach (2009, International Journal of Cosmetic Science), but is not a substitute for minoxidil or finasteride.
- Hairline thinning in women is frequently caused by ferritin deficiency, thyroid dysfunction, or elevated androgens, none of which a topical peptide serum can address.
- Ingredient matching between two products does not account for concentration differences, formulation vehicles, or penetration enhancers, all of which affect how an active actually performs.
- The Ordinary's serum is low-cost and low-risk as an adjunct, but anyone experiencing significant hair loss should get a dermatology workup before relying on cosmetic topicals.
- No topical peptide serum currently holds FDA approval as a treatment for hair loss; these products are regulated as cosmetics, not drugs, and efficacy claims are not independently verified before sale.
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About the Creator
Moosey’s Mom · TikTok creator
1.1M views on this video
This Multi-Peptide Hqir Serum helps hair to look thicker and fuller. @The Ordinary #hairserum #peptideserum #peptidehairserum #thinninghair
Sources & references
Citations extracted from our medical team's review. Click any citation to search PubMed.
Read More on This Topic
Our written guides go deeper with dosing details, comparison tables, and medical-team reviewed protocols.
Not medical advice. This video was made by Moosey’s Mom, not by FormBlends. Our write-up above is an editorial review, not a medical recommendation. Talk to your doctor before making any decisions about medications or treatments.