Is it true that fingernails are an indicator of nutritional levels?
AYour nails can tell you a lot about your nutritional status. Brittle, weak and dry nails indicate a possible calcium or vitamin A deficiency. White spots can be caused by a lack of iron or zinc, while cracked or breaking nails can be caused by insufficient protein or iron. Zinc and protein deficiencies can also cause white lines on the nails, and a lack of vitamin B12 can cause the ends of nails to curve. Spoon-shaped nails can be caused by iron deficiency, while reddish-brown spots can be put down to a lack of folic acid, vitamin C or protein.