I have done oil pulling before, several years ago, and have just started again, but I don't think it whitens teeth. It did, however, really help my gums. It headed off some serious problems my periodontist saw back then -- he even marveled months later at the reversal of the problems. I stopped the oil pulling for years because it seemed the problem was under control. Unfortunately, the issues are recurring, so I thought I'd try the oil pulling again. Sorry, kind of a tangent, but since it was mentioned, I thought I'd share that experience. I don't think it made my teeth noticeably whiter, but I wish it did!