b12 injections how many ml Cyanocobalamin Vitamin Injection 1000 mcg — Mountainside Medical How Long Do B12 Injections

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Here are some of the main reasons your doctor might recommend getting B12 injections: If You are B12 Deficient It is the number one reason to get B12 injections, to correct a vitamin B12 deficiency

Reviewed by Natalie Punt, DVM This article was reviewed by Natalie Punt, DVM

If taking oral supplements, it usually takes 2 to 4 weeks to feel a significant difference as levels build up in the body

Weekly or biweekly depending on your goals

It allows your body to absorb the B12 without going through your digestive system first