Does Caffeine Help With Cold Sores? The Surprising Truth About Coffee and HSV-1
                                
                                
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                                    5 min read                                
                            
                                An estimated 90% of American adults have been exposed to the herpes simplex virus (HSV-1), which causes cold sores. When a blister appears, people often seek remedies, and some wonder if their daily dose of caffeine might offer some relief.