Safe brightening is slow, gentle, and steady
You should wait about a month before resuming exercise but should expect longer for activity that puts pressure or strain on your chest like lifting or running
For this reason, it might be important to either lose weight or have a fat reduction treatment in this area, as a part of your treatment (although that will not remove existing pigmentation)
Many people take glutathione for glowing skin, even tone, and antioxidant support
As you can see, the more diluent you add, the lower the concentration, and the more volume you need to draw for a specific dose
For a summary of the published research, Rupa Healths clinical review of BPC-157 covers the available data