Replied By Bill (Davis, CA) on 12/22/2008
One should not take this much L-lysine as it has a severe effect on arginine levels. No medical practictioners have ever suggested more than 1500mg per day when an outbreak is present. To much L-lysine can have a toxic effect on the liver.Replied By Cheryl H. (Lufkin) on 10/16/2017
My doctor recommended 2000mg for 6 months to help with my reoccurring shingles. I am sorry to dispute your fact that one wouldn't suggest more that 1500mg. Are you a doctor - just wondering if I should research further.