If your nails show these symptoms, you may be deficient in vitamin B12
According to the US National Institutes of Health (NIH), B12 is an essential vitamin that plays a role in keeping nerves and blood cells in the body healthy, and also helps make DNA. B12 also helps prevent a type of anemia called megaloblastic anemia, which causes fatigue and weakness. Why is there a vitamin B12 deficiency in the body? Anemia is an autoimmune condition that makes it difficult for the small intestine to absorb vitamin B12. Additionally, people with intestinal damage or those who have undergone surgery such as a gastrectomy or partial bowel resection also have difficulty absorbing this essential vitamin. Vitamin B12 is found in animal-based foods such as fish, beef, poultry, eggs, and dairy products. Insufficient intake of these foods can lead to vitamin B12 deficiency. Factors such as age (over 60 years), pregnancy, breastfeeding, other medical conditions, and long-term use of certain medications such as blood sugar-lowering drugs or acid reflux medications can also cau...