Testosterone can be administered parenterally , but it has more irregular prolonged absorption time and greater activity in muscle in enanthate , undecanoate , or cypionate ester form. These derivatives are hydrolyzed to release free testosterone at the site of injection; absorption rate (and thus injection schedule) varies among different esters, but medical injections are normally done anywhere between semi-weekly to once every 12 weeks. A more frequent schedule may be desirable in order to maintain a more constant level of hormone in the system.  Injectable steroids are typically administered into the muscle, not into the vein, to avoid sudden changes in the amount of the drug in the bloodstream. In addition, because estered testosterone is dissolved in oil, intravenous injection has the potential to cause a dangerous embolism (clot) in the bloodstream.
This addition replaces the post-workout weight-gainer shake from Level 2. Whey protein hydrolysate is produced from WPI by enzymatic degradation (hydrolysis). The basic process involves using special enzymes to predigest the proteins in WPI so that it contains very small peptide fractions, or short chains of amino acids. This results in a specialized protein supplement that digests easily and enters the blood almost immediately upon ingestion. Because WPH is absorbed high in the gastrointestinal tract, it’s the fastest digesting protein source available. This feature is advantageous to bodybuilders, as research indicates that the faster amino acids enter the blood after training, the more robust the anabolic response. As well, WPH ingestion drives water into muscle cells (cell-volumizing effect), speeds recovery, and its high immunoglobulin fractions support the immune system.