Letrozole is an AI, which holds the purpose of blocking the aromatase enzyme, which is in turn responsible for the production of estrogen. By inhibiting estrogen production, this lowers total serum estrogen levels in the body. This will be useful to the breast cancer patient on the basis of such cancer often feeding off the estrogen hormone. It will be beneficial to the anabolic steroid user as excess estrogen often leads to some of the most commonly associated side effects of anabolic steroid use.
Letrozole also carries the ability to increase natural testosterone production through an increase in Luteinizing Hormone (LH) and Follicle Stimulating Hormone (FSH). There have been physicians who have chosen Letro as it’s often known to treat low testosterone conditions, but this is normally not the preferred method of treatment. Without question, when it comes to low testosterone treatment exogenous testosterone is generally the only thing that makes sense. However, Letrozole can be useful in such a plan in conjunction with exogenous testosterone in order to combat possible side effects. We will look into this in the effects section.
This is a persistent rumor among the anabolic steroid using community that has begun to erode as of late, but the rumor still persists. SERMs serve to block the action of Estrogen at the receptor sites in breast tissue by occupying the receptor sites in place of Estrogen so that Estrogen itself cannot exert its effects there through receptor site binding. Conversely, SERMs will also act as Estrogens at receptor sites at other cells in other areas of the body (the liver, for example in Nolvadex’s case). SERMs do not lower circulating levels of Estrogen in blood plasma. Aromatase inhibitors serve to do this by eliminating the production of Estrogen through binding to and disabling the aromatase enzyme, which is the enzyme responsible for the conversion (or aromatization) of androgens into Estrogen.
For the anabolic steroid user, Letrozole doses will normally be much lower. Even with the use of anabolic steroids, a 2.5mg dosing will normally be too high and could potentially drain the individual of energy; in fact, it’s almost guaranteed. The only exception we could make for such a dose would be to combat early gynecomastia symptoms. If symptoms begin to show 7-14 days at a dose of 2.5mg per day can reverse the symptoms. Once symptoms begin to fade away the individual should be able to tapper down to a more manageable dose and maintain it for the remainder of the cycle. If this doesn’t work there’s a good chance the symptoms have already set in beyond remedy. When this happens the only thing that will remove your gynecomastia is surgery. For standard estrogenic related protection, most men will find 0.5-1mg every other day to be more than enough. When used as an anti-estrogen in low testosterone treatment plans, even less may be needed. For the competitive bodybuilder, the final 7-14 days before competition, a full 1mg per day leading up to the show can be a solid dose and will greatly help with dryness and a tighter look. This is, however, not a dose most would want to maintain for an extended period of time as it can be harsh.