I have receding gums for years now. I am not too sure why it started in the first place, but they would get better and then worse again. I am 35. I am doing oil pulling with sesame or coconut oil + drop of oregano oil regularly, try and maintain good oral hygiene. regular visits to dentist, started taking vitamins and minerals. The gums improved a little, but I would expect them to get better after all that I've been doing. So only yesterday I came across an article about mouth breathing and it's negative effects on oral health. And I am definitely a mouth breather when I sleep and I have a gut feeling that this is what's stopping my gums from healing. Plus I breathe mostly through my mouth when walking for 2 hours almost every day. I am going to try and retrain myself breath through my nose and hope for some improvement. I tried breathing only through my nose when walking today and I must say it does take some effort. Hopefully this could be of some help for someone out there having gum issues.