The case for stacking BPC-157 and TB-500 comes down to this: they work on different phases through different mechanisms, so combining them addresses more of the healing cascade than either alone
PLoS ONE
Delayed skin reactions, with an acne-like skin rash appearing within one to four weeks after the injection, redness of the skin, and sensitivity to sunlight, which can last for up to 2 weeks after the treatment
How should BPC-157 & TB-500 Blend be stored and handled
However, for hyper-precise work, it's something to be aware ofthe final volume will be slightly more than the liquid you added
Exercise habits, particularly resistance training for muscle preservation and strategic cardiovascular work for additional fat oxidation, accelerate and amplify results