vitamin b12 oral vs injection Shots vs. IV Infusions: What is the difference? Vitamin B-12 Injections Vs Oral
Description
The Injections include the following naturally occurring vitamins, amino acids and minerals, plus many more: Methionine - an antioxidant amino acid that neutralizes free radicals

Dose ranges come from allometric scaling (using a math formula to translate a mouse mg/kg dose into a human dose) and from research community use

and Martin N

If you see both options, choose based on price, supplier reputation, and product testing

M., & Belykh, A

Common Local and Injection-Site Reactions Local reactions at the injection site are the most frequently reported adverse effects
