HCG 5,000IU is used in bodybuilding to mimic LH, stimulating Leydig cells to raise endogenous testosterone, helping prevent or reverse testicular atrophy and maintain intratesticular testosterone during or after suppressive anabolic steroid cycles. Some incorporate HCG within “PCT” alongside SERMs to hasten symptomatic recovery. In men on or after AAS/TRT, low-to-moderate HCG dosing can support spermatogenesis and fertility metrics.