Table 1. WADA Official Classification of Peptides Used in Doping.

Category and group of prohibited substances and methods	Relevant peptides and protein derivatives
S2. peptide hormones, growth factors, related substances, and mimetics	erythropoietin (EPO) and erythropoiesis-stimulating agents (ESAs)
	chorionic gonadotropin (CG) and luteinizing hormone (LH) and their releasing factors (leuprorelin, goserelin, buserelin, deslorelin, gonadorelin, nafarelin, triptorelin, etc.)
	growth hormone (GH), its fragments and releasing factors (sermorelin, GHRH, GHRPs, etc.)
	growth factors (GFs) and growth factor modulators (IGF-1, GnRH, FGFs, HGF, MGFs, PDGF, and VEGF)
S4. hormone and metabolic modulators	insulins and insulin-mimetics
S5. diuretics and masking agents	vasopressin and vasopressin analogues (desmopressin, felypressin, terlipressin, and lypressin)