2boxers said:
She's talking about MT1 you're referring to MT2
MT1 is just a bit weaker. It has all the same side effects,risks, just lower.
Melanotan 1 vs 2: Safety vs Potency (2026) | The Peptide Catalog
MT-1 is FDA-studied, MT-2 tans faster but with more side effects. Full comparison on tanning, sexual effects, and safety.
thepeptidecatalog.com
The Truth About Melanotan: Tanning Peptide or More?
Curious about Melanotan? Learn how this peptide works for tanning, metabolism, libido, and more. Explore differences between Melanotan I & II, dosing tips, benefits, and safety considerations.
www.revitalyzemd.com
Common Side Effects:
Nausea (dose-dependent)
Facial flushing
Increased libido
Long-term pigmentation changes
Darkening of moles or freckles (monitor with provider)
Contraindications: Not for individuals with a history of melanoma or skin cancer.
Melanotan 1: Benefits, Dosage & Side Effects
Explore the scientific research behind Melanotan 1 peptide and uncover its benefits, recommended dosage and potential side effects.
jaycampbell.com
But keeping consistent with my brand of full and open transparency, I need to share what other people have reported:
Possible formation of new moles and darkening of existing moles with the UNREGULATED use of Melanotan I (i.e. poor peptide quality, although
some people report that moles and freckles fade away after discontinuing use of Melanotan I)
The Therapeutic Goods Administration (TGA) of Australia: “Side-effects include darkened skin, increased moles and freckles, nausea, vomiting, loss of appetite, flushing of the face, involuntary stretching and yawning, and spontaneous erections.”
“Patchy loss of pigmentation” following 50 mg of Melanotan I used over two months (a CLEAR mis-use of the peptide)
One individual case report of a 23-year-old man developing malignant melanoma (although t
his comprehensive safety report examining multiple studies failed to find a definitive link)
In the book
Peptide Protocols (Vol. 1), Dr. William Seeds introduces some very specific instances where Melanotan 1 should not be used:
Do not use if there is a personal or family history of melanoma or non-melanoma skin cancer
Melanocortins may increase blood pressure. Use with caution if hypertension is present
It is NOT recommended to use a melanocortin agonist concurrently with a PDE5 inhibitor in men due to risk of priapism
For me personally, I would try a single vial at a very low dose if I wasn't stacking other peptides that have their own side effects. E.g Cagri and Reta can already trigger some occasional nausea. I already have tadalafil for the.... So, I wouldn't want to stack side effects.
Most of the legit peps have side effects that affect some more than others. I can't take Tesa at any dose without getting CPS in both hands.
