Guest guest Posted October 20, 2010 Report Share Posted October 20, 2010 My son complained of soreness at the corner of one side of his mouth yesterday, and today both sides are sore. I've increased his biotin in an effort to control yeast, and wonder if this or any other supplement might be the cause? He's getting 20,000 mcg biotin 3 x daily, plus about 20,000 mcg more scattered throughout the day. He's 10, weight 140 lbs. Does this sound like biotin, or something else? TIA, Quote Link to comment Share on other sites More sharing options...
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