The main complication of vitamin D toxicity is hypercalcemia, which is higher-than-normal levels of calcium ... you whether they are in the healthy range or if supplementation is necessary.

"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 ...

A new study has found that, in older people, both lower and higher levels of vitamin B12 may be associated with cognitive issues, even when these levels are within the normal range. Vitamin B12 ...

"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 ...

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.