I've also suffered from canker sores. Vitamin B (B-12 is the important one, I think) is a wonder cure. At the first sign of mouth soreness I start taking daily

I've also suffered from canker sores. Vitamin B (B-12 is the important one, I think) is a wonder cure. At the first sign of mouth soreness I start taking daily doses of Vitamin B and it cures the sores right up.