It just depends, I've taken 500 mg a week on two previous cycles and my sex drive wasn't exactly high and I only weighed 190-200 at the time. If you are using it for libido only then 250 should help balance it out. But if you are going to use test, you might as well include it in your cycle for more than just a libido booster. 500 mg stacked with 100 mg of tren would make a good cycle. You were asking about cutting in another post, the combo of the two would lean you out, it did a lot for me. Leave out the dbol, anadrol, and deca though, they don't help at all for losing body fat, for many it is the opposite.