US$ 25.58
vitamin b12 intramuscular injection Best Sites Hydroxocobalamin Injection: Vitamin B12 for
Description
It works at the cellular level to increase follicle size, stimulate dermal papilla cells, and prolong the anagen phase for thicker, healthier hair growth

Because the risk of B12 overdose is so low, theres no upper limit for B12 intake

PMID: 30074168

Food remains in the stomach longer because of the delay in gastric emptying