Denise (Temecula, CA) on 06/04/2006:
I have never been able to take Vit C. Within four days of ingesting it I would break out in massive cold sores. This also occurs when I eat large amounts of citrus or organic home grown tomatoes.
Don (Perth Western Australia) on 05/22/2006:
High dose vitamin C caused my magnesium level to fall drastically. After taking high vit C for two months, I finished up in the emergency ward having defibrillation to correct severe atrial fibrillation brought on by low magnesium. Please add this warning to your advice pages, thanks.