What’s The Difference Between Endogenous And Exogenous Testosterone?

Exogenous testosterone refers to testosterone that is manufactured outside the body, which is often used in TRT to treat hypogonadism. Typically exogenous testosterone is administered via injection. Endogenous testosterone differs because it is produced by the body. Recent research of clomiphene citrate, also known by its trade name as Clomid, which is generally prescribed to women with infertility problems in order to stimulate ovulation has shown some interesting results by increasing testosterone levels in men endogenously.

The recent off-label study, clomiphene citrate was administered daily to a group of men with low testosterone for a period of three months. Half way through the study it was discovered that all of the subjects had increased their testosterone levels with no side effects reported even a year after the study had been concluded.