Your nails can tell a lot about your body health. I was taking guitar lessons trying to play with my nails instead of a pick. One of my nails would not grow straight, it kind of curved downwards, which made it harder to play the guitar. My guitar teacher then pointed out that it was because I had calcium deficiency and I should drink more milk. I really didn’t believe him at the beginning, but I was surprised that it actually worked, drinking more milk made my nails grow better! Follow the link below to know what else your fingernails tell you about your health and diet: