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 ...

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 ...

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 ...