Testosterone Suspension is an injectable preparation of pure, un-modified and un-esterified Testosterone, almost always suspended in a water base within microcrystals (hence the name Testosterone Suspension). Within the bodybuilding and athletic world, Testosterone Suspension is regarded as the most potent and strongest form of injectable Testosterone available, and it is known for producing some of the most rapid mass, strength, and physique changes out of all injectable preparations of Testosterone. This is for several reasons. The first reason is because this is the purest form of Testosterone, unmodified and unesterified, meaning it is instantly active the minute it is injected into the body. Also, because there is no added ester bonded to the Testosterone molecule, there is more total Testosterone per mg of Testosterone Suspension, making it a far more potent product. Because ester weights must be factored into the total weight of the substance, esterified formats of Testosterone (or any hormone) such as Testosterone Propionate, Testosterone Enanthate, and Testosterone Cypionate do not all yield 100mg of Testosterone in 100mg of Testosterone Enanthate, for example. Once the body cleaves off the ester that is bound to the molecule, the weight of the ester is removed, and so for example, in 100mg of Testosterone Enanthate, there is in reality approximately 70mg of Testosterone. 100mg of Testosterone Suspension, however, yields exactly 100mg of Testosterone. Because esterified variants of Testosterone have longer half-lives and require their esters to be removed (before releasing pure Testosterone), optimal peak blood plasma levels are achieved often in weeks of use. This is not the case with Testosterone Suspension, where optimal peak blood plasma levels are achieved in a matter of hours instead.