pubmed.ncbi.nlm.nih.gov/29782846 Chang CH, et al
Vitamin B12 is an essential nutrient, and deficiency can lead to severe complications and ill health
Surgeon 3:309316 Petek M, Sikiric P, Anic T, Buljat G, eparovic J, Stancic-Rokotov D, Seiwerth S, Grabarevic Z, Rucman R, Mikus D, Zoricic I (1999) Pentadecapeptide BPC 157 attenuates gastric lesions induced by alloxan in rats and mice
At clinical doses under supervision, the most common side effects are mild nausea in the first week (typically resolves by day 7 to 10), injection site reactions (redness, minor swelling, localized soreness lasting 24 hours), and occasional transient fatigue or mild headache in the first few days
it affects dose accuracy by a potentially meaningful margin