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MT-1 (afamelanotide): Selective for MC1R (melanin production receptor) 13-residue linear peptide FDA-approved for EPP Side effects: typically headache, fatigue, nausea generally mild More expensive per dose, more conservative tanning MT-2: Activates MC1R, MC3R, MC4R, MC5R broader receptor profile 7-residue cyclic peptide (smaller) Not FDA-approved Side effects: nausea, flushing, libido effects (MC4R activation), potential melanoma concerns with new moles Cheaper per dose, faster/darker tanning For tanning users prioritizing safety profile and tolerability, MT-1 is the more documented option despite higher per-mg cost
However, for the best results, it is often recommended to take liposomal glutathione on an empty stomach and astaxanthin with a meal that contains healthy fats to aid its absorption
Rather than waiting passively for healing to occur, the peptide actively recruits the cellular machinery necessary for tissue regeneration
But to get those skin-firming, collagen-building benefits, you need to use it correctly
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