Stargene (Ben Lomond, Ca) on 01/30/2010:
For decades I'd suffered from canker sores (aka: aphthous ulcers) inside my mouth. A dental study of Japanese communities revealed that their low dental plaque was due to compounds called isothiocyanates in wasabi, the green radish paste. Since that time, 12 years ago, I have not had a SINGLE canker sore, even though I still abrade my mouth, gum and inner lips as much as ever, because every day I brush my teeth using ~1 part wasabi to ~3-4 parts toothpaste, ANY toothpaste.
The wasabi actually inhibits bacteria from attaching to mouth surfaces using their plaque! This is an actual preventive which works.
Paul (Mountain View, CA) on 02/06/2007:
After years of suffering from painful mouth ulcers (Canker sores) and trying several unsuccessful natural cures, wasabi did the trick. I stumbled on this cure accidentally, but have used it successfully for the last 2 years. At the first sign of sores, I eat wasabi chips or wasabi peas and the development of the ulcers are arrested and they are completely gone in 12-36 hours. Usually just a handful of chips a couple of times a day does the trick. I have also tried wasabi mayonnaise and straight wasabi. They do work well; but the combination of the wasabi and salt in the chips and peas seems to work best. I know it sounds crazy, but try it! Just make sure the wasabi comes in contact with affected area for a minute or two. What used to cause 7-10 days of agony on a regular basis, is now barely a ripple in my life. I don't know if it will work for all types of mouth ulcers, but it worked for mine.
