bpc-157 human clinical trial randomized controlled study What do we know about 'research only' peptides? Q&A with expert Stuart Phillips This doesn't mean BPC-157 is

The evidence base is preclinical

After the 1st shot, which I got in the left arm, I got an odd cool, numb, tingling feeling in the back of my head on the left side 2 hours post injection (in addition to chills, fatigue and low grade temp for a few days)

Steroids directly influence androgen receptors, while many peptides studied for muscle growth affect growth hormone or recovery pathways

However, some nerve damage from long-term deficiency may be permanent

Pre-emptive short-term nicotinamide mononucleotide treatment in a mouse model of diabetic nephropathy

Self-reported community sources describe GI events scaling with per-dose amount and brief fatigue scaling with total daily dose