How do nails indicate health?

Answer 1

Dark nails indicate a B12 deficiency, white nails can indicate anemia, red nails are due to Heart disease, blue nail beds are a sign of a lack of oxygen in the blood, and yellow nail beds are a symptom of liver disorders. There are also other things your nails can indicate by the ridge type, the shape of the nail, and the quality of nail (brittle or fraying for example) as well.