Low testosterone can contribute to a decrease in motivation or self-confidence. You might feel sad or depressed, or have trouble concentrating or remembering things. Some of these signs and symptoms can be caused by other factors, including medication side effects, obstructive sleep apnea, thyroid problems, diabetes and depression. It's also possible that these conditions cause low testosterone levels, so treatment might result in increase of testosterone levels. A blood test is used to diagnose a low testosterone level. Can testosterone therapy promote youth and vitality? Testosterone therapy can help reverse the effects Vital Alpha Testosterone. of hypogonadism, but it's unclear whether testosterone therapy would benefit older men who are otherwise healthy. Although some men believe they feel younger and more vigorous if they take testosterone medications, there's little evidence to support the use of testosterone in otherwise healthy men. Guidelines from the American College of Physicians indicate that testosterone therapy might improve sexual function somewhat in some men, but there's little evidence that it improves other functions, such as vitality and energy. What are the risks of testosterone therapy for normal aging?