Melanotan 1 vs Melanotan 2: A Research Comparison

5 min read · For research use only

Melanotan 1 and Melanotan 2 are synthetic analogs of alpha-melanocyte-stimulating hormone (alpha-MSH) studied in melanocortin-receptor research. They are related but structurally and functionally distinct. This article compares Melanotan 1 vs Melanotan 2 for laboratory research only. Neither is for human or animal use, and nothing here is medical advice.

Structure and Receptor Selectivity

Melanotan 1 (afamelanotide) is a linear alpha-MSH analog studied for comparatively selective activity at the melanocortin-1 receptor (MC1R), the receptor most associated with pigmentation research.
Melanotan 2 is a cyclic analog with broader, less selective activity across multiple melanocortin receptors, including MC4R, which is why its research literature extends beyond pigmentation to other melanocortin-signaling models.

What the Difference Means for Research

Selectivity is the key variable. Melanotan 1's more targeted MC1R profile suits pigmentation-focused models where off-target melanocortin signaling would be a confound. Melanotan 2's broader activity is studied where multi-receptor melanocortin signaling is the subject of interest. Puritide Research also lists MT-2 alongside Melanotan 2 in the hormonal and sexual-health research collection.

Handling and Quality

Both are supplied lyophilized and verified to at least 99% purity by third-party HPLC and mass spectrometry with a batch certificate of analysis. See the Melanotan 1 mechanism of action and Melanotan 2 mechanism of action articles for detail.

Common Research Questions

What is the structural difference between MT-1 and MT-2? Melanotan 1 is a linear alpha-MSH analog; Melanotan 2 is a cyclic analog. The cyclization is associated with broader melanocortin-receptor activity.

Why is receptor selectivity relevant? Melanotan 1's more selective MC1R profile suits pigmentation-focused models; Melanotan 2's broader activity suits multi-receptor melanocortin research.

Summary

Melanotan 1 is a more selective linear analog; Melanotan 2 is a broader cyclic analog. Explore Melanotan 1 and Melanotan 2, both research use only.

Referenced compound

Melanotan 2 10mg →

Melanotan 2 is a synthetic cyclic analog of alpha-melanocyte-stimulating hormone (α-MSH), designed as a non-selective agonist across the melanocortin receptor family.