Mnogo jednostavnije stvari se koriste da bi se smanjilo dejstvo estrogena,a masteron koriste takmicari u zadnjim fazama priprema za super-shreded izgled...ne vidim sta ce ti masteron ako nemas 4% bf i ne spremas se za takmicenje i imas iza sebe par godina ciklusa 
radi ovog navedenog
Masteron is, to be honest, my favorite Anabolic/Androgenic Steroid (AAS). For many years, this compound was unavailable to the average athlete; it was frequently counterfeited, often very expensive, and almost never available on the black market. The most common form of this product, as manufactured by major pharmaceutical houses, is 50mg/ml ampules with either 1-2mls per amp (or vial). Needless to say, these products used to be the only game in town, and since this drug was a particularly sought-after compound for bodybuilding contest preparation, it’s price made it prohibitive for all but the highest level bodybuilders.
Masteron is a derivative of DHT (as you can tell from it's chemical name: 2a-methyl-dihydro-testosterone propionate), but what they fail to tell you is that DHT and it’s derivatives are commonly used in treatment of certain forms of breast cancer (see the etymology here: MASTectomy, gynocoMASTia, MASTeron…get it?). Masteron is not clinically used for weight gain (as is common with most steroids), so this makes it a very unique steroid from that perspective. Unfortunately, much of the information on Masteron available in medical journals doesn’t focus on weight or strength gain or even fat loss, for those reasons. Most information on Masteron focuses on it’s use in treating certain forms of breast cancer, and it does this reasonably well.(4)(5) To give you an idea, Masteron + Tamoxifen actually fared better than ChemoTherapy for immediate objective responses from patients (
.So? What does this tell us? Well, this makes it a very exciting drug for a lot of reasons. Clearly it won’t aromatize at all nor will it have progesteronic sides…remember, Nolvadex (and most ancillaries) are used to reduce estrogen for breast cancer patients, so a drug used to treat breast cancer obviously wouldn’t convert to estrogen...and in fact Masteron may interact with the aromatase enzymes to inhibit aromatization of other steroids into estrogen, and may additionally interact with estrogen (as a “blocker” of sorts) at the receptor site. (4)(5) This is how it helps to combat breast cancer, obviously, but this could also be part of the reason that Masteron is considered a “cutting” or “Pre-contest” drug. Masteron may actually be very useful for combating estrogenic/progesteronic side effects yes, you read that right….if you include Masteron in your cycle, you may not need other “ancillary” drugs like Arimidex or Letrozole). Hence, much like Proviron, Masteron could be used as an anti-side-effect-drug (remember, most ancillary drugs we use to combat estrogenic sides, like nolvadex, letrozole, and arimidex were originally developed to combat breast cancer...and thats exactly what Masteron was developed and used for). Along a similar line, being a DHT (DiHydroTestosterone) derivative, it’s got a very nice ability to add muscle hardness to an already lean physique…remember, Masteron has a deceivingly low anabolic/androgenic ratio, but since DHT is 5x as androgenic as testosterone and has a 3-4x higher affinity to receptor sites, Masteron provides a lot of “bang for the Buck” when examined on a Mg for Mg basis.
