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MT-2 vs Melanotan I: Which Research Peptide Is Right for Your Laboratory?

Both MT-2 (Melanotan II) and Melanotan I (MT-1, also known as afamelanotide) are synthetic analogs of alpha-melanocyte-stimulating hormone (α-MSH), and both have been used extensively in melanocortin receptor research. However, they are meaningfully different

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  • Both MT-2 (Melanotan II) and Melanotan I (MT-1, also known as afamelanotide) are synthetic analogs of alpha-melanocyte-stimulating hormone (α-MSH), and both have been used extensively in melanocortin receptor research. However, they are meaningfully different compounds with distinct structural profiles, receptor selectivity, and research applications. Choosing between them depends entirely on the specific receptor targets and experimental questions a researcher is investigating.
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Comparison

Melanotan I vs Melanotan II

Melanotan I vs Melanotan II Melanotan I and Melanotan II differ in receptor selectivity, approved-drug history, sexual effects, and safety concerns. Neither is FDA-approved as a t…

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Comparison

Quick Comparison

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Comparison

MT-I vs MT-II

More MC1R-selective than Melanotan II, so it tans with far less of MT-II's appetite-suppression and spontaneous-erection activity — but is used more frequently.

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Comparison

Pharmacokinetic Comparison

The pharmacokinetic profiles diverge as sharply as the structures. Tmax ~36 h ~1-2 h Intrinsic t1/2 ~30 min Apparent t1/2 ~15 h (implant-driven) Cmax 3.7 ng/mL Not well characteri…

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