Many bodybuilders favor the use of mesterolone during dieting phases or contest preparation, when low estrogen and high androgen levels are particularly desirable. This is especially beneficial when anabolics like Winstrol®, Anavar, or Primobolan® are being used alone, as the androgenic content of these drugs is relatively low. Mesterolone can be effectively used here to adjust the androgen to estrogen ratio upwards, bringing about an increase in the hardness and density of the muscles, supporting libido and general sense of well being, and increasing the tendency to burn body fat. It is also commonly used (at a similar dosage) to prevent gynecomastia when other aromatizable steroids are being administered, often in conjunction with 10-20 mg per day of Nolvadex.
Three main options are available when it comes to commonly available aromatase inhibitors. These are: Arimidex, Letrozole and Aromasin (Exemestane). The first two (Arimidex and Letrozole) are not recommended for use in PCT for bodybuilders. This is because a PCT plan for bodybuilders will typically include the use of SERMs like Clomid or Nolvadex, which are known to interact negatively with the two. Using Arimidex or Letrozole in a PCT plan that includes a SERM such as Nolvadex or Clomid will, therefore, be counterproductive and may actually sabotage the recovery process. The best aromatase inhibitor to use in a PCT program that includes a SERM is Aromasin. This drug blocks the activity of the aromatase enzyme, reducing estrogen production and increasing testosterone levels without negatively impacting the blood plasma levels of the SERM or cholesterol profiles of the user (as is the case with the other drugs).
Note: the aromatase inhibitor Aromasin must be discontinued once the use of HCG is halted.
When used as an ancillary, it can be taken by male athletes and bodybuilders all throughout their cycle length at 50 – 100mg per day, as there is no limit to how long it can be utilized for. Some individuals prefer to also run Mesterolone (Proviron) as a PCT (Post Cycle Therapy) drug in order to reduce Estrogen levels and boost fertility. Although this can be done, there are much better compounds with similar (and stronger) effects for PCT. When the risk of even weak endogenous Testosterone suppression is thrown into the mix with Mesterolone (Proviron) , it is advised to avoid the use of Mesterolone (Proviron) for PCT purposes unless there are no other options available. During a period in which individuals are attempting to recover their natural endogenous Testosterone levels, any threat no matter how minimal to endogenous Testosterone production should be unwelcome and avoided at all costs.