how long does your arm hurt after a b12 injection Why do I feel worse injection? Vitamin B12 Injection Sites: All

Do not use the vial beyond its labeled expiration date

during these times vitamin c is a great way to help your immune system working properly

Vitamin B12 shots may not be suitable for people with a history of: sensitivity to vitamin B12 Lebers disease, which affects the optic nerve kidney problems hypokalemia (low potassium levels) deficiencies in other nutrients, particularly folic acid and iron Vitamin B12 injections typically begin to work straight away

The injections are prescribed by a medical provider and given intramuscularly, or into the muscle

When taken over a long period, high potassium intake (through supplements or diet) may lower Vitamin B12 levels, especially if your diet is already lacking in B12 sources