Testosterone is a natural substance produced in our testicles and adrenal glands. Blood levels range from zero to 1500. Testosterone is available in a short acting and long acting forms. It comes in a patch, gel and injections. There are also illegal forms that can be harmful and ineffective. They all contain androgenic and anabolic properties. Anabolic properties are what make muscle while androgenic properties cause undesirable effects such as breast enlargement, prostate enlargement, liver inflammation and sometimes death. Testosterone precursors that can be taken by mouth are Pregnanalone, Androstenedione, and DHEA. It is important to know what type, how much, and the time to take these drugs to work out safely. I recommend naturally occurring forms of hormones because they are not harmful. It is also important to select the ones with high anabolic properties and the lowest androgenic properties. To get maximum effect I suggest injectable testosterone or the newest testosterone gel. This is complicated and I will explain to each patient.