Caffiene is also high in arginine and low in lysine. I used to drink nothing but coca cola when I was younger for a couple years so maybe that is one of the reasons I got this lip problem. I also drank a lot of coffee in college and for last couple months I only drink water. There are a lot of foods that have a high arginine to lysine ratio so I think everyone should check it out and see if they have had a history of high arginine intake.