There is evidence that taking L-LYSINE supplements with a compromised liver and or kidneys is bad for you. This may help explain why some people are having mixed or less than desired effects with the BHT [ butylated hydroxytoluene ] treatment for hepatitis C. Many of these people are including supplements including L-LYSINE supplements as a part of their treatment. It seems this is a bad idea for the treatment of hepatitis. Link here about all this: http://www.livestrong.com/article/394394-l-lysine-contraindications/
And any person who is experiencing both kidney and liver failure should read that linked information and should be especially concerned.
So, if you have a compromised liver and or kidney do NOT take L-LYSINE as a supplement....Oscar