US$ 28.40
folic acid b12 injection Compounded Methylcobalamin (Vitamin B12) Injection, 5mg/mL Mecofol Forte Injection Effective Treatment
Description
Most users tolerate it well

And this can only happen when there's adequate acid production in the stomach, which as we get older, tends to be a problem since acid levels decrease with age

No, daily dosages of 5,000 mcg B12 methylcobalamin are considered safe

In both cases, vitamin B12 is probably a hapten, and intramuscular or subcutaneous administration favors a reaction to metabolically unchanged cobalamin administered in a short period of time in a large dose
