What happens if your body has too much vitamin B12? Read on to find out the dangerous side effects of having excessive levels ...

Medically reviewed by Erika Prouty, PharmD Key Takeaways Vitamin B12 is generally safe, but rare reactions like allergies or ...

Vitamin B12 is a vital nutrient that plays numerous key roles in maintaining health. It is available in different forms and ...

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 ...

Meeting the minimum requirement for vitamin B12, needed to make DNA, red blood cells and nerve tissue, may not actually be enough – particularly if you are older. It may even put you at risk for ...

Stop feeling drained and sharpen your mental focus by incorporating these nutrient-dense powerhouses that protect your ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." While vitamin B12 might not be as buzzy as calcium or an immediately recognizable household name like ...

"Normal" levels of vitamin B12 may not be enough to ward off dementia, new research finds. Researchers at University of California San Francisco studied 231 healthy older adults (averaging 71 years of ...