Vitamin B12 is needed to form red blood cells and DNA
The toxicity can result from daily doses of 60,000 international units of vitamin D taken over several months, according to the Mayo Clinic
While generally safe, common B12 side effects include diarrhea and swelling at the injection site
Frequently Asked Questions People with low B12 levels due to poor absorption, certain medical conditions, or strict vegetarian/vegan diets may need B12 injections to restore healthy levels
My energy, mood and attitude just changed, I may have been really deficient now that I think about it
If you feel constantly tired and your levels of B12 are low, bringing them up to normal may give you more energy, studies show