These types of steroids are generally made by non-licensed manufacturers and are not overseen by any regulatory board. Due to it becoming increasingly harder to obtain pharmaceutical grade steroids, most people opt for underground brands. The main problem with underground brands is no one knows what type of environment these steroids are produced in. They may or may not be produced in a sterile environment. There are however many big underground brands available that have hundreds of positive reviews, it is always best to stick with the big brands.
It is important to start a PCT once you finished a steroid cycle to avoid a dramatic loss of the mass gained. The question on how soon to initiate a PCT depends on the kind of steroids you used. If your cycle is comprised of orals, which have relatively the shortest effect on the body, it is advised to start immediately. Some say PCT can begin as early as the last day of the steroid cycle. If short-acting esters or water-based injectables, PCT is recommended 4-7 days after the last injection. In the case of long-acting esters, it should be around 10-14 days after the last injection.