For the most part, B12 injections are very safe and have few side effects
folic acidFolic acid, folate, vitamin B9 is used for the treatment of folate deficiency and its complications, and for the treatment of folic acid deficiency associated with liver disease, kidney dialysis,
Song KS, Lee WJ, Chung KC, Koo JS, Yang EJ, Choi JY, Yoon JH: Interleukin-1 beta and tumor necrosis factor-alpha induce MUC5AC overexpression through a mechanism involving ERK/p38 mitogen-activated protein kinases-MSK1-CREB activation in human airway epithelial cells
methodology and software: S.B.A
Community sources describe freeze-thaw cycles producing visible particulates in some cases typically traced to crystallization or container-integrity issues
Depending on your research goals, many labs also explore metabolic signaling peptides like GLPs