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Many folks eat high lysine foods prior to or during a cold sore event, and avoid high arginine foods. For many folks, healing cold sores fast has been as simple as taking 1,000 milligrams to 3,000 milligrams of lysine in capsule supplements during an outbreak. High lysine foods to eat are most meats and dairy products.
How to treat a cold sore. 1  Denavir: This is my favorite prescription cream. Itâs a cream that you apply every 2 waking hours for four days. Itâs active ingredient is an anti-viral and what Iâve seen in the last 10 years are very good results and my patients always have good results with it, so itâs my go-to.