Vitamin B12 is typically well-tolerated, but in very rare cases, there are serious side effects to be aware of. Learn more about them here.

This article was reviewed by Lynn Marie Morski, MD, JD. Key Takeaways: There’s not much research on B12 shots for weight loss ...

"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 ...

Low on energy, noticing hair fall, or mood swings? Dr Deepashree R explains how Vitamin B12 deficiency impacts women’s hair, ...

A neurologist explains how common medications can cause vitamin B12 deficiency, damage nerves over time, and trigger numbness, memory issues, and fatigue.

Brits plagued by forgetfulness are being told to get their vitamin levels checked, as running low on a crucial nutrient can ...

Vitamin B12 Level: What happens if your body has too much vitamin B12? Read on to find out the dangerous side effects of having excessive levels of this nutrient in the body. Vitamin B12 is a vital ...

Blumberg is a contributor for TIME. Blumberg is a contributor for TIME. Everyone needs vitamin B12: It helps the body produce red blood cells and maintain healthy brain function, along with so many ...

Select an option below to continue reading this premium story. Already a Honolulu Star-Advertiser subscriber? Log in now to continue reading. A: Because it can take many years for symptoms of a 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 ...