Proviron has four distinct uses in the world of bodybuilding. The first being the result of its structure. It is 5-alpha reduced and not capable of forming estrogen, yet it nonetheless has a much higher affinity for the aromatase enzyme (which converts testosterone to estrogen) than testosterone does. That means in administering it with testosterone or another aromatizable compound, it prevents estrogen build-up because it binds to the aromatase enzyme very strongly, thereby preventing these steroids from interacting with it and forming estrogen. So Mesterolone use has the extreme benefit of reducing estrogenic side-effects and water retention noted with other steroids, and as such still help to provide mostly lean gains. Its also been suggested that it may actually downgrade the actual estrogen receptor making it doubly effective at reducing circulating estrogen levels.
Like any other anabolic steroid, your diet and workout plan are crucial to your success, regardless of your goals. If you’re interested in losing body fat while maintaining muscle mass, you will need to ensure that you consume a lower-calorie daily diet that still contains an abundance of protein, and you will want to participate in high-intensity exercise, such as cardio or aerobics. If you want to add bulk, you will need to add calories and protein, and you will need to participate in regular strength and resistance training, such as weightlifting.