Listen I am a dental hygienist that works in a periodontal practice that specialized in gums. Don't listen to some of these responses. They don't make any sense. Xylitol doesn't help the enamel!!! Also, your dentist would tell you if your gums are receding and they don't do it overnight. It is not uncommon to have it happen slightly. Fluoride toothpaste will help your enamel, but there isn't such thing as weak enamel some of the older dentist used to use this term and people use it to make up an excuse for getting cavities. Watch the Sugar and the sodas you are drinking they are what causes tooth decay. Also, don't eat candies like that other person said that will only make the decay worse.