Testosterone Base is an injectable steroid that contains testosterone with no ester attatched to it. It is pure testosterone and has no ester attached, and thus no ester calculated in the weight. Where 100 mg of a testosterone ester equals 100 mg minus the weight of the ester, 100 mg of Testosterone Base contains an actual 100 mg of the steroid. Very potent and very powerful. Although it is a rather crude compound, it is without a doubt very, very effective. Testosterone Base is the most common anabolic hormone that there is and is also considered the most basic. Due to this, bodybuilders often consider it the base steroid to most all cycles. Testosterone Base is both anabolic and androgenic in nature. Users of this steroid will notice a dramatic gain in muscle size and strength, as well as an overall sense of well being and increases libido and sex drive.