does b12 injection work instantly Why Do You Need Injections? · PA Relief Benefits of B12 Injections for

Most side effects are mild and go away quickly

Patients who have early Leber's disease (hereditary optic nerve atrophy) have been found to suffer severe and swift optic atrophy when treated with vitamin B12

The IOMs safe upper limit for daily vitamin D intake is 4,000 IU

Severe allergic reactionssuch as difficulty breathing, rash, or swelling of the face and throatare extremely rare but require immediate medical attention

Therefore a B12 deficiency may lead to decreased serotonin production, which in turn may cause a depressed mood

Vitamin B12 supplements If your B12 levels are low but not severe, your doctor will suggest you take vitamin B12 supplements