WRONG and WRONG. there half lives are not 5 days. enanthates half live is 12 days and cyps is 14 i believe, they are basically the same. you dont need to inject 2x with those tests. sustanon has prop in it and thats why you will want to inject it twice a week if doing 500mg a week, you want to take advantage of the all the esters as much as possible. And there you have it