Looksmaxxing and peptides: what young men are being sold

What looksmaxxing is, and where peptides come in

'Looksmaxxing' is internet slang for maximising your looks. It began on forums for young men and spread across TikTok and YouTube, where it ranges from ordinary advice about skin care, sleep and exercise to extreme ideas about bone structure, jaw shape and height. It has its own vocabulary: 'mogging' someone means outshining them; 'softmaxxing' means changes like grooming and diet; 'hardmaxxing' means drugs or surgery. Peptides belong to the hard end.

The money involved has grown fast. Chainalysis, a firm that analyses cryptocurrency transactions, reported in June 2026 that crypto payments to grey-market peptide vendors rose from about $12 million in the last quarter of 2025 to $32 million in the first quarter of 2026, a run rate of more than $100 million a year, and it tied the surge to the looksmaxxing subculture ¹. Its report found that some China-based chemical manufacturers that had supplied precursors for fentanyl and amphetamines had moved into selling finished peptides ¹. A Fortune reporter described buying peptides online with stablecoins from a Chinese seller in a transaction that felt entirely ordinary ².

What is being sold

The products recommended in looksmaxxing spaces fall into a few groups: drugs to get lean, a tanning peptide, skin and hair peptides, and compounds that raise growth hormone, sold for muscle or, most worryingly, for height. The table shows how each compares on our evidence grades, its US status and its status in sport ³:

Two things stand out. Only the GLP-1 drugs and PT-141 have serious human trial evidence, and none of that evidence was gathered in lean young men looking to change their appearance. And several of these products are banned in competitive sport, which matters for any teenager who plays a tested sport at school or club level.

Melanotan II: the tanning peptide

Melanotan II is a synthetic version of a hormone that darkens skin. It was tested in people in the 1990s: in the first small study, two of three healthy men developed darker skin, along with spontaneous erections, nausea, yawning and sleepiness ⁴. It was never approved. A related compound, afamelanotide, is approved for a rare light-sensitivity disease, but that is a different molecule, made and dosed under regulation ³.

The melanotan II sold online is a research chemical. Vials bought from three online shops and labelled as 10 mg contained between 4.32 and 8.84 mg, and two shops' vials carried unknown impurities of 4% to 6% ⁵. Researchers who read hundreds of forum posts found people using it before holidays and competitions, often combining it with sunbeds, and flagged changing moles, infections from injecting and contaminated products as risks ⁶. Case reports link it to kidney damage, including a kidney infarction and earlier reports of muscle breakdown and kidney failure, although cause and effect are not proven ⁷. Darkening moles are a particular worry because they can mask, or be confused with, skin cancer.

Height and growth hormone boosters

The cruellest promise in looksmaxxing is height. Height is set by the growth plates at the ends of the long bones; once they close, usually by the late teens, no drug can lengthen the bones. Even the approved growth treatments for children with genuine growth disorders work only while the plates are open, and their labels say so: navepegritide, approved in 2026 for achondroplasia, is approved only for children whose growth plates are still open ³. No peptide sold online has been shown to add height to anyone.

The products sold for height and muscle are growth hormone secretagogues, which push the body to release more growth hormone: MK-677, CJC-1295 and ipamorelin. MK-677 is not even a peptide but an oral small molecule ³. In older adults it raised growth hormone and IGF-1 substantially, but fasting glucose rose too ⁸; in obese men it increased lean mass without reducing fat, and glucose tolerance tests showed impairment at two and eight weeks ⁹. None of these compounds is approved, all three are prohibited in sport, and in healthy older adults even real growth hormone produced only small changes in body composition alongside more swelling, joint pain, carpal tunnel syndrome and breast enlargement in men ¹⁰. A study of bodybuilding forums found women using CJC-1295 for weight loss, muscle, younger-looking skin and sleep, usually alongside other performance and image drugs, and worrying about long-term consequences ¹¹.

Getting lean: GLP-1 drugs

Semaglutide and tirzepatide are among the best-studied drugs in the world, and they work for weight loss. But the trials that proved it enrolled adults with obesity, or overweight with a weight-related illness: STEP 1, for example, required a body mass index of at least 30, or 27 with a related condition ¹². Nobody has tested them as a way for lean young men to get leaner or sharpen a jawline, and the side effects, nausea, vomiting, gallbladder problems and loss of muscle along with fat, do not shrink because the user is young and thin.

Most of the semaglutide and tirzepatide in looksmaxxing circles is not the approved product either. When researchers bought semaglutide from online sellers without a prescription, vials labelled 99% pure measured 7.7% to 14.4%, and every one contained endotoxin ¹³. Retatrutide, the next-generation drug often promoted for 'shredding', is not approved anywhere and is still in trials; our pipeline overview explains where it stands.

Skin and hair peptides

GHK-Cu, the copper peptide, is the main skin-and-hair product in looksmaxxing protocols, often injected rather than applied. Its evidence is mostly from cells and animals. The one small randomised trial we have on record, in 13 patients recovering from laser treatment, found no difference on blinded measures ¹⁴, and a 2025 review found a surprising absence of clinical studies of GHK-Cu at all ¹⁵. Injecting a cosmetic ingredient made for creams adds the risks of injection and contamination to a product with little evidence that it works. Our skin and hair hub grades every topical peptide we cover.

The risks that apply to all of it

Some risks come with the market, not the molecule. Grey-market vials are unregulated: contents can be under- or over-strength, impure or simply wrong, and a certificate of analysis from the seller does not prove what is in the vial; our guide to spotting a fake COA explains why. Injecting brings infection risk, especially with shared or reused equipment. Combining several products, which looksmaxxing protocols encourage, makes it impossible to tell which one caused a problem; in 2025 two women were left critically ill on ventilators after peptide injections at a longevity conference, and the cause was never determined, as our article on serious reactions describes.

Young users face extra risks. Growth hormone and its boosters act on a body that is still developing. Hormonal drugs can affect fertility and mood. Several products are banned in sport, and a positive test can end a school or college athletic career. And the culture itself, which rates bodies on a scale and treats normal features as defects, is linked to body dysmorphia and anxiety; buying drugs does not fix that.

What has actual evidence

The irony of looksmaxxing is that the changes with real evidence behind them are the unglamorous ones. Acne, the most common appearance worry in teenagers, has approved treatments that a doctor or dermatologist can prescribe. Early hair loss in young men has two approved medicines, finasteride and minoxidil, tested in large placebo-controlled trials; our article on peptides for hair loss compares the peptide claims against them and finds the peptides well behind. Sunscreen protects skin from the damage that ages it. Resistance training builds muscle and changes how a face and body look over months, and sleep and diet affect skin, weight and energy.

None of that is as exciting as a vial with a code name. But every item on that list has been tested in people, and none comes from a seller that used to supply fentanyl chemicals.

What parents should know

Peptides do not look like drugs. They usually arrive as small vials of white powder labelled 'for research use only', with bacteriostatic water to dissolve them and insulin syringes to inject them. They are often bought with cryptocurrency or gift cards and shipped from abroad. Talk of 'protocols', 'stacks', 'peptides', 'mogging' or 'hardmaxxing', or a sudden interest in jawlines, bone structure or height, are signs that a young person has been reading these communities.

A lecture rarely helps. It works better to ask what they have read and what they hope it will do, to look at the evidence together, the grades in our encyclopedia are a place to start, and to involve a doctor if they are worried about their height, skin, weight or mood. Real options exist for most of those worries, from dermatology for acne to a growth assessment for a child who is genuinely short, and none of them comes in an unlabelled vial.

Frequently asked questions

What peptides are used for looksmaxxing?

Mostly melanotan II for tanning, GHK-Cu for skin and hair, growth hormone boosters such as MK-677, CJC-1295 and ipamorelin for muscle or height, and GLP-1 drugs such as semaglutide for leanness. Apart from the GLP-1 drugs and PT-141, none has meaningful human evidence for these uses.

Can peptides make you taller?

No. Once the growth plates in the bones have closed, usually by the late teens, no drug can increase height. Even approved growth treatments for children work only while the plates are open.

Is melanotan II safe?

It is not approved anywhere. Online vials have been found under-strength and impure, and case reports link it to kidney damage; changing moles are another concern.

Is it legal to buy these peptides?

Most are sold as 'research chemicals' not for human use, and none of the looksmaxxing products except the approved GLP-1 drugs and PT-141 is an approved medicine. Our legal status checker shows each compound's status by country.

Related on Grey Peptides

• Legal Status Checker
• Verify hub
• Skin and hair hub

Sources

1. Chainalysis Team. The $100 million crypto 'looksmaxxing' boom: how Chinese cartel suppliers pivoted to the gray-market peptide ecosystem. Chainalysis blog, June 4, 2026. Read October 3, 2026.
2. Fortune. I bought peptides with crypto. How my purchase helped fuel a $100 million gray-market, 'looksmaxxing' economy. June 4, 2026. Read October 3, 2026.
3. Grey Peptides encyclopedia: evidence grade, US status and 2026 WADA record for each compound, and the navepegritide approval (open epiphyses). Read October 3, 2026.
4. Dorr, R. T., et al. (1996). Evaluation of melanotan-II, a superpotent cyclic melanotropic peptide in a pilot phase-I clinical study. Life Sci, 58(20), 1777-84. PMID: 8637402
5. Breindahl, T., et al. (2015). Identification and characterization by LC-UV-MS/MS of melanotan II skin-tanning products sold illegally on the Internet. Drug Test Anal, 7(2), 164-72. PMID: 24771717
6. Gilhooley, E., et al. (2021). Melanotan II User Experience: A Qualitative Study of Online Discussion Forums. Dermatology, 237(6), 995-999. PMID: 34464955
7. Peters, B., et al. (2020). Melanotan II: a possible cause of renal infarction: review of the literature and case report. CEN Case Rep, 9(2), 159-161. PMID: 31953620
8. Chapman, I. M., et al. (1996). Stimulation of the growth hormone (GH)-insulin-like growth factor I axis by daily oral administration of a GH secretogogue (MK-677) in healthy elderly subjects. J Clin Endocrinol Metab, 81(12), 4249-57. PMID: 8954023
9. Svensson, J., et al. (1998). Two-month treatment of obese subjects with the oral growth hormone (GH) secretagogue MK-677 increases GH secretion, fat-free mass, and energy expenditure. J Clin Endocrinol Metab, 83(2), 362-9. PMID: 9467542
10. Liu, H., et al. (2007). Systematic review: the safety and efficacy of growth hormone in the healthy elderly. Ann Intern Med, 146(2), 104-15. PMID: 17227934
11. Van Hout, M. C., et al. (2016). Netnography of Female Use of the Synthetic Growth Hormone CJC-1295: Pulses and Potions. Subst Use Misuse, 51(1), 73-84. PMID: 26771670
12. Wilding, J. P. H., et al. (2021). Once-Weekly Semaglutide in Adults with Overweight or Obesity. N Engl J Med, 384(11), 989-1002. PMID: 33567185
13. Ashraf, A. R., et al. (2024). Multifactor Quality and Safety Analysis of Semaglutide Products Sold by Online Sellers Without a Prescription: Market Surveillance, Content Analysis, and Product Purchase Evaluation Study. J Med Internet Res, 26, e65440. PMID: 39509151
14. Miller, T. R., et al. (2006). Effects of topical copper tripeptide complex on CO2 laser-resurfaced skin. Arch Facial Plast Surg, 8(4), 252-9. PMID: 16847171
15. Mortazavi, S. M., et al. (2025). Topically applied GHK as an anti-wrinkle peptide: Advantages, problems and prospective. Bioimpacts, 15, 30071. PMID: 39963574

Educational information, not medical advice. Each dose in this guide names its source, an approved label or a published study. None is a recommendation for you. An unapproved compound has no established safe or effective human dose, and products sold for “research use only” are not made or tested for people. Talk to a doctor before acting on anything on this site, including before you start, stop or change any medicine or dose.