wada 2025 prohibited list bpc-157 WADA's now in force Athlete Guide to Anti-Doping |

Krasemann S, Madore C, Cialic R, Raufeld C, Calcagno N, et al

McCoy AT, Benoist CC, Wright JW, Kawas LH, Bule-Ghogare JM, Zhu M, Appleyard SM, Wayman GA, Harding JW

Common symptoms include: Fatigue or loss of motivation Increased body fat, especially around the midsection Mood swings, irritability, or anxiety Poor sleep quality or insomnia Low libido or erectile dysfunction Muscle loss or difficulty gaining muscle Hair loss Prostate enlargement Many of these symptoms are often mistaken for just getting older, but hormone imbalance is frequently the real cause

Timeline of side effects: what to expect week by week Knowing when side effects typically appear and resolve helps researchers prepare mentally and practically