Doctors who suspect biotin deficiency may take a patient's family history and do a blood test. For treatment, they may recommend over-the-counter biotin supplements and foods rich in biotin, such as nuts, salmon, and meat. Cooked eggs, especially the yolk, are on the list of biotin-rich foods, because cooking breaks down 60 to 70 percent of the avidin, leaving more free biotin. For those with diagnosed biotinidase deficiency, a consistent diet and supplementation of five to ten milligrams of biotin daily are required to avoid or mitigate complications.

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