A vitamin B12 blood test is a reliable way to determine if you have adequate levels of this crucial nutrient. Vitamin B12 is ...

You sleep eight hours, drink your coffee, and still feel like you are running on fumes by noon. A growing body of clinical ...

Millions of Americans take a daily vitamin, assuming it is doing something. That assumption is not always correct. The gap between what you swallow and what your body absorbs widens with age. The only ...

Share on Pinterest Scientists have found a link between B12 levels and cognitive health in older adults. Milan Markovic/Getty Images Vitamin B12 is needed for the development and function of nerve ...

A new study links elevated homocysteine from B12 and folate deficits to physical fatigue in men and low motivation in women.

Vitamin B12 is an essential vitamin, and low levels are linked to obesity. B12 shots could improve fatigue if you have a deficiency, but there’s not much research on them as a weight loss treatment.