Testosterone can improve body composition in men with clinically low testosterone (hypogonadism): it tends to reduce fat mass and increase lean mass. However, in men with normal testosterone levels or in women, evidence for weight loss is weak. Observed weight reduction is often modest and may be confounded by water retention or muscle gain. Moreover, testosterone therapy without a medical indication carries risks such as cardiovascular events, sleep apnea, and prostate changes. Current guidelines do not recommend testosterone for weight loss. A healthy lifestyle with caloric deficit and exercise remains the gold standard. The provided context does not contain specific studies on testosterone and weight loss, so this answer is based on general medical evidence.
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