melanotan stomach cramps Might have been a bad idea': Man takes viral injection that stimulates melanin. Then he goes Here's the part nobody explains
Description
Brown/black eumelanin and yellow/red pheomelanin are pigmented polymers synthesized in unique organelles called melanosomes within melanocytes
Hepatology 75 (1), 219228
The pigment in melanosis coli is localized within the colon as there is usually no pigment deposition in the small intestine Anthraquinone laxatives cause damage to the colonocytes

Both are lipotropic compounds, not peptides

Genital skin biopsy is essential to make the diagnosis