The authors explicitly call for randomized clinical trials, and that is the correct conclusion
Compound Identity and Research Classification The safest product-page classification is Melanotan II research peptide. IUPHAR/BPS classifies MT-II as a peptide ligand, while PubChem and FDA substance records support the compounds molecular identity fields [1] [2] [5]
He is a consultant/advisory board member for Boehringer Ingelheim, Currax Pharmaceuticals, Lilly, Altimmune, Janssen Pharmaceuticals, Jazz Pharmaceuticals, Novo Nordisk, Pfizer, Veru Pharmaceuticals, Zealand Pharmaceuticals and Amgen
Data availability This review article analyses data from previously published studies
Weekly injections over multiple weeks sustained improved IGF-1 levels by 1.5-3x baseline