Replied By KT (Irvine, Ca) on 11/11/2009
I agree with people linking Vitamin-C to cold sores. So, I am not alone! When taken in a dose as high as 500mg I start to get cold sores or ones already present get worse, talking about lip-condition here. I wonder what the explanation is! Reacta-C is one I took and it gives me cold sore symptoms. If I buy a formula where Vitamin-C is a part, I make sure it's not more than 50mg or else I don't buy the formula at all. B-Complex for eg. comes with Vitamin-C as part of it, some with 50mg some with 500 mg. So yea, may be taking Vitamin-C in small doses is okay or make your own like suggested here by grinding dry citrus fruit peels.