Medically reviewed by Jonathan Purtell, RDN Key Takeaways Vitamin B12 supports energy, red blood cell formation, nerve function, and DNA production.A deficiency can cause fatigue, weakness, headaches, ...

Discover the most nutritious tinned fish, packed with protein, omega-3s, and essential vitamins like B12. Here are ...

From preventing anemia and shoring up energy to keeping you sharp and focused, there are many reasons why vitamin B12 is considered a key nutrient. Note: The U.S. Food and Drug Administration (FDA) ...

Your body needs vitamin B12 for maintaining metabolism, producing DNA and red blood cells, keeping the nervous system healthy, and more (1, 2). Fortunately, most people get enough of this ...

This essential vitamin is generally considered safe, even at high doses. However, most people get enough B12 through diet alone, and unnecessary supplementing may lead to negative side effects.

The Best Weight Loss Supplements for Women This article was reviewed by Lynn Marie Morski, MD, JD. Key Takeaways: The best ...

Hand tremors, whether random or frequent, can be alarming. It can be even more concerning when they impact your daily life and activities. While they’re mostly harmless, they can sometimes be a sign ...

Vitamin B12 (cobalamin) is essential for the health of nerve tissue, brain function, and red blood cells. Sources include meat, eggs, and some yeast products. Vitamin B12 is the largest and most ...

Metformin is the first therapy for almost everyone with type 2 diabetes, but studies show that the drug creates a risk of vitamin B12 deficiency. Your clinician should test your B12 levels regularly ...

While generally safe, multivitamins can change how other medications work, affect how much medication gets absorbed into your bloodstream, or create unwanted nutrient buildup.