Testosterone is a sex hormone; It is naturally produced in both men and women but is made at a much higher level in men. Low testosterone is not just about libido or becoming stronger and bigger in the gym. While this can be an effect of treatment, the condition known as Low T is much more in-depth. It is what gives a male the secondary sex characteristics of a man. Testosterone – which can profoundly reduce energy levels – is responsible for stimulating muscle growth, achieving normal erectile and cognitive functions, restore energy levels and maintaining normal bone density.
It’s tempting to think that bringing testosterone back to “healthy youthful levels” will mean that a return of overall youth and fitness will follow. But it probably doesn’t work that way UNLESS the person in question actually IS youthful with a medical problem that has resulted in abnormally low testosterone. For the older man (say 50+), youthful levels may be neither normal nor healthy in a body that is no longer young in every other respect. The point here is, tread with caution. There could be serious, unforeseen downsides–just as there have been with HRT for women.