The best time to take vitamin B12 depends on why you are taking it and in what form. Learn the best timing for your needs.

Administered through an injection into a muscle, vitamin B12 shots contain a synthetic version of B12, otherwise known as cyanocobalamin. Although even high dosages of vitamin B12 carry no risk of ...

Obtain hematocrit, reticulocyte count, Vit. B 12, folate, and iron levels before and during treatment. Reevaluate periodically. Premature infants. Renal impairment (possible aluminum toxicity).

You might not feel the effects of correcting your vitamin B12 deficiency until at least a few weeks after you start increasing your dietary intake, taking a supplement, or getting an injection.

B12 shots can have mild side effects like diarrhea and swelling at the injection site. Vitamin B12 injections are an effective way to treat a deficiency, but they're not for everyone. In fact ...

For example, in a study of 199 depressed individuals, 100% of those treated with antidepressants as well as injected vitamin B12 improved by at least 20%. Only 69% of people treated with ...

While vitamin B12 might not be as buzzy as calcium or an immediately recognizable household name like Vitamin C or D, it's just as important for your health—and particularly your brain health.

New research from UC San Francisco suggests that the current recommended levels of Vitamin B12 may not be sufficient for preventing cognitive decline in older adults. A study found that even those ...