I think...: ...Your question has a built-in answer: biting nails is the problem, stopping nailbiting is the solution. Of deficiencies, iron and vitamin d are the most common, and you may have one or both, but it's unlikely there is any connection to the nail problem.
Answered 12/8/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
2 doctors weighed in across 2 answers
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