Significant improvement                                                    
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            He is someone who suffers from cold sores. I watched a YouTuber living in Japan who also has them and is being treated with biotin by a dermatologist. I have noticed significant improvement while taking biotin, as it soothes the itching associated with cold sores.        
         
        
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            Unfortunately, since taking biotin, I have developed severe headaches. Almost 30 minutes after consumption, I experience a terrible migraine that lasts for about two hours, and painkillers do not help. I previously took a higher dose of another brand without any issues. Now, I open the capsule and take only half. The headaches persist but are less intense, but it’s still surprising considering my history with vitamins.        
         
        
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