I don't know about that since this is only my second fast. I can't remember when it started but me teeth hurt when I brush them. Particularly the teeth that have gold foils or caps. [I got the work done at a dental school, knew silver was bad, and gold was less expensive then the natural looking choice (can't remember what they are called)]. It's not only on the gold, its also along the area where the teeth and gum meet. I've been wondering if my body is trying to heal the gums.

I'd like to hear more on this too.

I can tell you emphatically YES! In May of 2014, I was diagnosed with a severe case of periodontitis disease. I mean I had pockets that were 10, 11, and 12s. The dentist even said I would probably have to get 3 or 4 teeth removed. Well, I went to a periodontitis specialist who confirmed this. I went on a 3 week fast and also brushed and flossed and when I saw that same dentist 8 months later, he was so shocked that my 10, 11, and 12 pockets had reduced to 3s and 4s. He asked me what did I do. If I had taken any herbs or anything else because he had never seen anything like it. I told him no. But i did go on an extended fast to cure my high BP and other ailments I had. I didn't know what was the cause either. So I did some research on gum disease and fasting and found out that there is a connection in Water Fasting and healing of periodontitis disease. Once my body cured all of my other ailments, it started healing my damaged gum tissue and whallah, I no longer have periodontis disease. I now fast ten days a month for health reasons and I've never felt better. It's amazing how your body heals itself when it doesn't have to focus on food digestion.