Energy Boost The most immediate and popular reason people seek a B12 shot is to fight fatigue
Pinch the skin to lift a fold of fat, insert the needle at a 45- or 90-degree angle (depending on needle length and tissue thickness), and inject slowly
Talk to your doctor about ways to prevent bone loss (osteoporosis), like taking calcium and vitamin D supplements
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