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.

Medically reviewed by Leigh Weddle, PharmD Vitamin B12 and magnesium are essential nutrients for energy production, nervous ...

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

This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. Since the dawn of the Internet (and probably well before), there have been several solutions sold for weight management — including ...

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

A large team of doctors and medical researchers with diverse backgrounds, affiliated with several institutions across the U.S., and led by a group at the University of California, San Francisco, has ...

While taking B12 on an empty stomach is generally safe, some mild side effects may occur. “A few people may have very mild side effects like nausea, stomach upset, bloating or a metallic taste. These ...