sostenon is the godfather of all testosterones, would you rather be taking 5 esters in one cc, or 1 ester in a cc, the test he is using is a one ester, if he admisters 1500 mg this week, next week he would need to administer 2500 for his body to recognize it and respond, because his receptor is already full of one ester, and its going to continual recognize any amount 1500 mg and below, thats why you use sostenon, because it works for one month, and your body doesnt recognize the amount of mg use because of the 5 esters, you can take 2500 mg today and 750 mg 2 days later and your body is going to recognize the agent being administered because your receptor is not saturated with one ester only.