4 Important Symptoms of Vitamin B12 Deficiency You Should Know

Vitamin B12 is an essential nutrient that plays an important role in normal nervous-system function, red blood cell production, and DNA synthesis. A deficiency can develop gradually and may cause symptoms affecting several parts of the body.

Recognizing possible symptoms and understanding the factors that increase the risk of deficiency can help people seek appropriate testing and treatment when needed.

Key Takeaways

Vitamin B12 is important for nerve function and red blood cell production.
Possible deficiency symptoms can involve the nervous system, blood, mouth and digestive system, and vision.
People following vegetarian or vegan diets, older adults, and individuals with certain digestive conditions may have a higher risk.
Treatment can include dietary changes, fortified foods, supplements, or injections, depending on the cause and severity of the deficiency.