my advice to guys who are serious about bodybuilding and are contemplating blasting and cruising (essentially being on gear year round) and chancing giving themselves a real medical condition, hypogonadism, and shutting themselves down for life , but do see the benefits of being on gear most the year ,, is to do ONE PCT per year. you run your various cycles for a period of about 8-9 months, then you spend 3-4 months doing a PCT re restarting your HPTA.