Testosterone cypionate is a synthetic version of the naturally occurring male hormone testosterone. It is commonly used in hormone replacement therapy (HRT) to treat individuals with low testosterone levels, helping to restore normal levels and alleviate symptoms such as fatigue, low libido, and muscle weakness. Administered via intramuscular injection, it provides a slow and sustained release of testosterone, typically requiring dosing once or twice weekly. This therapy helps maintain physiological hormone levels, promoting overall health and well-being.