Since it is effective for such a long period of time, Testosterone enanthate is always taken more frequently by athletes during their "steroid intervals." An injection of 250 mg every 2-3 weeks helps maintain strength and mass.
I would have to say 7 to 8 days. I used my sex drive as a determinant.
Im thinking enanthate is the longest acting test in Sustanon 250 and after 8 days... my sex drive was gone. (Thanks to the fina completely shuttting me down)
Whatever sex drive I had was completely driven by the sustanon so... at almost exactly 8 days... nada.
decanoate is the longest ester in sust. I believe eod injections are needed to get the most stable blood levels with enanthate. There's a thread floating around in the archives discussing this, I cant remember the author, jubei maybe???