Testosterone is an essential hormone for both men and women, with various functions. Testosterone is known to eliminate body fat, which may be part of the reason testosterone deficiency is so often linked with obesity and diabetes. Interestingly and perhaps unexpectedly, testosterone is linked to financial success and productivity. Testosterone deficiency can manifest itself in a variety of symptoms and related conditions, including fatigue, low libido, prematurely graying hair, sleeping problems, and more. Of course, treatments will vary from person to person, and not every treatment has the same results for everyone, but many men with Low-T find that testosterone replacement therapy is the solution for them.