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PubMed PMID 9920688 California Department of Alcoholic Beverage Control

Somatropin is structurally analogous to endogenous pituitary hGH, and it is commonly used as a reference standard in laboratory work involving growth hormone biology

It is a cofactor in the metabolism of fatty acids and its derivative acetyl-L-carnitine helps regulate carbohydrate, protein, and fatty acid metabolism and cellular energy production

The compound shows high enzymatic selectivity, preserves lean mass, and engages longevity-related pathways (e.g., SIRT1), but remains a nonFDA-approved research substance that is WADA-banned and should be used under medical guidance