Epimedium, commonly known as "Horny Goat Weed," has been used in traditional Chinese medicine for centuries, particularly as an aphrodisiac and to treat symptoms associated with male sexual health, including low libido and erectile dysfunction. Its use for supporting or treating low testosterone is rooted in historical practice rather than modern scientific validation. The primary bioactive compound, icariin, has demonstrated some androgen-mimicking activity in animal studies, and limited in vitro research hints at potential hormonal effects. However, robust clinical trials in humans are lacking, and there is insufficient evidence to confirm a direct or meaningful impact on testosterone levels in men. Most available studies focus on sexual function rather than hormonal profiles, and extrapolation from animal models to humans remains speculative. Therefore, while Epimedium is traditionally used for male vitality and may have some plausibility based on preliminary research, its effectiveness for specifically supporting or treating low testosterone is not scientifically established.