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.

IF YOU KNOW anyone who's deficient in a B vitamin, you may see them taking a vitamin B-complex supplement. They're being touted as a cure to all your vitamin B related needs—but do you really need it?

Everyday Health independently vets all recommended products. If you purchase a featured product, we may be compensated. Learn why you can trust us. On This Page B vitamins are called the “energy ...

Many people take B-complex supplements for energy—but are you taking them at the right time? Yup, when you take a supplement can play a significant role in how it impacts your body and health. We ...

Beef is a good source of vitamin B12. However, other foods, like clams, oysters, lamb liver, and sardines, contain even ...

Supplements may negatively affect sleep quality due to their ingredients, mode of action, or the timing of doses. Some vitamins, such as melatonin, promote relaxation and induce sleep. Others can act ...