<p><strong>For treating low levels of riboflavin (riboflavin deficiency) in adults</strong>: 5-30 mg of riboflavin daily in divided doses.<br />
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<strong>For preventing migraine headaches</strong>: 400 mg of riboflavin (Vitamin B2) per day. It may take up to three months to get best results.<br />
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<strong>For preventing cataracts</strong>: approximately 2.6 mg of riboflavin (Vitamin B2)</p>