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.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." It’s normal to wonder if you’re meeting your nutritional needs if you’re feeling off in your day-to-day.

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

Which vitamin B supplement is best? If you’re wondering how your body cells are able to function properly, think about B vitamins. There are eight B-group vitamins, and they help the body create new ...

Vitamin B12 is essential for red blood cells, DNA synthesis and your cognitive health. Taking your vitamin B12 supplement at breakfast time may help with efficacy. While side effects are rare, vitamin ...

It is safe to take vitamin B12 and magnesium together. Both may help improve your energy and the health of your nervous ...

Vitamin B12 is a nutrient that’s naturally present in many foods and helps keep your blood and nerve cells healthy. However, if you have trouble getting enough B12 from your diet, the best B12 ...

The world of vitamin B12 supplementation has undergone significant changes in recent years. Once confined to basic tablets, modern B12 supplements now come in various forms designed to meet specific ...

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 ...

Vegan diets can increase the risk of vitamin B12 deficiency if not planned properly. A senior clinical dietician explains why ...