TE-300 is an oil based injectable steriod, designed to release testosterone slowly from the injection site. Once administered, serum concentrations of this hormone will rise for several days, and remain markedly elevated for approximately two weeks. It may actually take three weeks for the action of this drug to fully diminish. For medical purpose this is one of the most used testosterone by athletic, used regularly to treat cases of hypogonadismand other disorders related to androgen deficiency.Testosterone is a powerful hormone with notably prominent side effect. Much of which stem from the fact that testosterone exhibits a high tendency to convert into estrogen. Related side effect may therefore become a problem during cycle. For starters, water retention may be noticeable. This can produce a clear loss of muscle definition, as subcutaneous fluids begin to build.