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Melanotan 1 is approved by the FDA and in the EU as a prescription medication for patients with erythropoietic protoporphyria

Metabolic parameters including glucose tolerance, insulin sensitivity, and IGF-1 levels were monitored throughout the treatment period, confirming that the favorable metabolic profile persisted with chronic use

The study also found that glutathione levels began to return to baseline approximately one month after supplementation ceased, indicating that consistent use is key to maintaining optimal levels

It remains an investigational peptide used in clinical and research settings outside of formal FDA-approved indications