My 12 yr old boy has brown finger nails and toe nails. Is that a anemia or vitamin deficiency? He's tried a lot.

Brown nails. 5 things come to mind:1)fungal infection 2) zinc deficiency also known as acrodemaritis enteropathica 3) smoking unlikely 4) darier disease (keratosis follicularis) or 5) iodine poisoning. Better to see a good internist or dermatologist or a good podiatrist. Thanks.

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