how long does it take for b12 injection to work Vitamin Injections: What They Can and Can't Do Seeing Red: Do B12 Injections

& Rudel, L

Vitamin B12 can be injected directly into the body to help with the growth and development of red blood cells in the most effective manner possible

Another good reason is that some people have quite a strong adverse reaction to methylcobalamin injections

If you let it go for too long, it can cause problems in your nervous system such as: Vision problems Memory loss A pricking or numbing sensation Difficulty speaking or walking due to ataxia (loss of physical coordination) Damage to your extremities (hands, feet, arms, etc.), particularly your legs Other problems could include Infertility (this should go away with B12 treatment) Stomach cancer Bleeding and infections Damage your heart, brain, bones, and other organs in your body If you're pregnant and don't get enough vitamin B12, your baby is at risk of a serious birth defect called a neural tube defect