Sleep improvements are usually felt within the first few weeks
BPC-157 increases VEGF expression explaining improved revascularization in injured tissues
Some improvements such as decreased inflammation, improved immune function, better sleep, mood or energy are noticeable within a few weeks
References Heffernan, M., Summers, R.J., Thorburn, A., Ogru, E., Gianello, R., Jiang, W.J., & Ng, F.M
The weekly two days off and the four week break between courses are both aimed at the same thing, which is preserving receptor sensitivity and letting your own pulsatile growth hormone release resume
While those testimonies are anecdotal, many in the bodybuilding community have begun experimenting on themselves