vitamin b12 injection vials Sandoz Injectable Solution - 1000 mcg/10 mL Vitamin B-12 3000 mcg Injection,
Description
Do not double up to make up for a missed dose
"Cyanocobalamin reductase / alkylcobalamin dealkylase (MMACHC, Human)"

There are also many types of vitamin B12 cyanocobalamin, methylcobalamin, adenosylcobalamin, and hydroxycobalamin

Typically, the results last one week Are there side effects

By supporting basal metabolic rate and energy expenditure , it encourages the body to utilize stored energy more effectively