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Head-to-head evidence comparison — which supplement is right for you?
Dihydroxyacetone vs Melanotan-2: their evidence isn't directly comparable (one is unscored); they're alternatives for tanning & skin darkening — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Dihydroxyacetone and Melanotan-2 are closely matched across evidence, studies, and safety.
Verdict
Mostly mechanism / observational
Verdict
Mostly mechanism / observational
Top outcomes
Cosmetic use as directed on the product — typically 3-6% DHA in a lotion, up to about 20% in professional spray formulations. Apply to clean, exfoliated skin; colour develops over 2-4 hours.
evening
Lotion or mousse at 3-6% DHA
No legitimate or recommended dose — melanotan-2 is an unapproved, illegal grey-market injectable with no quality control. We do NOT provide a dosing protocol. Grey-market vials are typically self-injected subcutaneously, but contents are unregulated and harms are documented.
not-recommended
None — unapproved grey-market injectable
Hours
Days
On UV exposure
Days to weeks of dosing
Hours after dosing
Within hours of dosing
Weeks to months/years
Durability of the sun protection factor provided by dihydroxyacetone.
Photodermatol Photoimmunol Photomed (2004) · Crossover · n=10
10 healthy volunteers treated twice with 20% DHA cream on three areas of the volar forearm
UV-generated free radicals (FR) in skin: their prevention by sunscreens and their induction by self-tanning agents.
Spectrochim Acta A Mol Biomol Spectrosc (2008) · In vitro
Electron spin resonance measurement of free radicals in skin biopsies during UV irradiation
Clinical Use and Safety of Self-Tanner (Topical Dihydroxyacetone) in Dermatology: A Systematic Review.
J Cutan Med Surg (2026) · Systematic review
PROSPERO-registered systematic review of 16 studies across Embase, Medline, Cochrane and Web of Science
Melanoma associated with the use of melanotan-II.
Dermatology (2014) · Case study · n=1
Case report: a 20-year-old woman developed cutaneous melanoma after a 3-4 week course of self-injected melanotan-II to augment sunbed tanning
Melanotan II injection resulting in systemic toxicity and rhabdomyolysis.
Clin Toxicol (Phila) (2012) · Case study · n=1
Case report: a 39-year-old man injected 6 mg of internet-purchased melanotan-II (six times the recommended starting dose) for winter tanning
Melanotan-induced priapism: a hard-earned tan.
BMJ Case Rep (2019) · Case study · n=1
Case report: acute low-flow priapism after subcutaneous melanotan injection for artificial tanning
Both Dihydroxyacetone and Melanotan-2 are closely matched — the best choice depends on your specific health goals.
For tanning & skin darkening, Dihydroxyacetone has a higher relevance score (55 vs 35).
No known interactions between Dihydroxyacetone and Melanotan-2 have been documented in our database. However, always consult a healthcare provider before combining supplements.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.