What are testosterone cycles?

Testosterone cycles refer to a regimen where individuals alternate between periods of taking testosterone (commonly exogenous testosterone) and not taking it, to manage hormone levels and minimize side effects. This approach is often used in testosterone replacement therapy (TRT) or bodybuilding. For instance, in one cycle discussed by Dr. Peter Attia, a patient alternates every eight weeks between testosterone and HCG (Human Chorionic Gonadotropin), which helps maintain testosterone levels while alternating between external and internal sources of testosterone 1. This cycling can help in preserving testicular function or in kickstarting pituitary function using medications like Clomid, especially if the pituitary function is compromised 1.