Many androgens, and especially the strongest ones such as Oxymetholone, cause a fall in testosterone natural production in the body during the duration of the steroid cycle.
This is easily explained if we consider that the provision of external androgen obviates the production of testosterone by the body since these androgens produce the same effect as testosterone.
Therefore the body reacts by stopping the production of testosterone, since it is no longer necessary during the cycle time.
The trouble is that after the end of the cycle, the metabolism does not immediately boost the testosterone production which has become dangerously low. It is therefore urgent to stimulate it if we are to avoid a serious metabolism accident (weight loss, strength loss, libido loss, and depression).
Therefore bodybuilders use Clomid, which triggers the production of endogenous testosterone in the testicles, thus avoids the accident.
Athletes demonstrate that a daily dose of 50 to 100 mg of Clomid helps restore normal testosterone levels in 2 weeks.