This article was reviewed by Lynn Marie Morski, MD, JD. There’s not much research on B12 shots for weight loss. People with obesity tend to have lower vitamin B12 levels, but it’s unclear if B12 shots ...

Vitamin B12 deficiency can be caused by poor diet or malabsorption, leading to fatigue, muscle weakness, and memory problems.

Vitamin B12 may shape metabolism and aging more than previously understood. Vitamin B12 is typically associated with red ...

Vitamin B12 is one of eight B vitamins that play essential roles in your health, including neurological function, DNA and red blood cell production, and metabolism. Most people consume enough B12 ...

The recommended intake of vitamin B12 for people older than 14 is 2.4 micrograms a day. People who follow a vegetarian or vegan diet may need vitamin B12 supplements. It's best to talk to a healthcare ...