Downward nails: nails are made from tough keritin protein., Diet,past and current illnesses,age all effect the way they grow. Downward growing nails may denote liver,heart or respiratory disease---or arsenic poisoning. Nails that are flat in their growth pattern can be caused by Iron or protein deficiency--psoriasis and diabetes See your private doctor for evaluation
Answered 1/11/2018
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6 doctors weighed in across 3 answers
6 doctors weighed in across 3 answers
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