I had receded gums at one tooth, it's been that way for many years. I started OPing a month ago (every morning with sesame oil, some days sunflower) and I just recently noticed that the gum has regrown, there is still a tiny part of my tooth exposed but the difference is huge and pretty amazing (the root is now covered, there is just that groove that is immediately under the gumline that is still there). I didn't even expect this, I wasn't looking for it to grow back, I just happened to notice it has moved up considerably and couldn't believe it at first since I read everywhere that gums don't grow back once gone. They do with OPing!! I will report when it's completely healed (almost there:-)
Also, my teeth seemed to get whiter in the first week.
It's been only a month so I will report more benefits as they come.