I've been taking a blend of tren ace, test prop and mast prop on short duration cycles for a few months now. AI is important, though I am still taking stuff for anti-prolactin (SAMe 1200mg/day, P-5-P 400mg/day, and Vit. E 400mg/day). I had some sides the first short cycle I did, which I thought were prolactin related - trouble keeping an erection, trouble finishing, lowered libido, etc. Turns out they were E2 related, and after I started taking adex (I thought the mast would do the job - it wasn't) things got much better. Still taking the anti-prolactin protocol more out of paranoia than anything. Might try skipping them next cycle, just to see. Can always start them up if an issue arises.
Testosterone Propionate is a pure testosterone hormone. Although synthetic it is a perfect replica of the primary naturally produced male androgen testosterone. By design, the hormone is attached to the Propionate (propionic acid) ester, a small/short ester that enables the hormone’s release time to be controlled. Without an ester, the hormone would disperse and dissipate rapidly post administration. By attaching the ester, this promotes a controlled release and allows the individual to inject the hormone less frequently. Once Testosterone Propionate is injected, the ester slowly begins to detach from the hormone. As the ester is detached the testosterone hormone begins to release into the blood. The half-life of Testosterone Propionate is approximately two days, which is substantially longer than ester free testosterone, which carries a half-life a little less than 24 hours.