In fact, it only helps in people with a zinc deficiency, but that could be you – athletes and people who exercise a lot are prone to this because zinc is lost through sweat. Zinc deficiencies are associated with lower testosterone levels, so if supplementation brings zinc levels back into the normal range, testosterone levels will rise accordingly. However, Ketosium XS Keto above normal body levels will not increase testosterone any further, and high doses of supplementary zinc can irritate the intestines and cause liver and kidney damage. Over time, high doses of zinc can also result in a copper deficiency. A decrease in testosterone level is a natural result of aging. The only way to know if a man is experiencing the symptoms of low testosterone is to get a testosterone level test.