<<Disclaimer: Verify this information before applying it to your situation.>> Catherine asked about her daughter's cold sores-- My holistic physician said that cold sores are caused by a lack of the enzyme(?) lysine in the diet. You can either use a lysine-based cream (don't know if this is GF), or 100% lysine capsules that you can find in health food stores, vitamin shops, and some grocery/drug stores. I had cold sores my whole lifetime until I recently started taking his advice and using the lysine. Whenever I feel that "itch" coming on, I take the lysine for a few days, and use the cream to keep my lips moist, and it usually nips it in the bud. That stuff works! Hope this helps-- Bobbi [log in to unmask]