where to inject b12 stomach Instruction Guide for Intramuscular (IM) Self-injection of Methylcobalamin 1mg/5mg Vitamin C and B12 Injection
Description
2012 Dec;50(10):875-85

About 1.5% of the general population is estimated to have a deficiency of B12 but this figure increases sharply with age to about 6%

Vitamin B-6 (pyridoxine)

The primary safety concerns include immunogenicity (development of antidrug antibodies), gastrointestinal reactions, and contamination risks in unregulated products
