I tend to get cold sores from time to time. I tried taking a preventative dose of L-Lysine (1g) and it helped with the severity but I still got cold sores. Since then I have started taking 2g per day. I typically take one in the morning and one in the evening. I haven't gotten a cold sore since begging the 2g per day regimen, its been over a year. I plan to continue taking them indefinetly unless instructed otherwise.
My question: Will taking 2g per day the way that I have been cause any complications in the long term? Is it even possible to overdose on an amino acid like L-lysine?