Oil pulling is the latest natural fad for a fresh mouth, but it's actually a very old practice. It comes from ancient Ayurvedic medicine and involves swishing a tablespoon or so of oil, usually coconut, around the mouth for about 20 minutes.
The idea is that bacteria in the mouth will be pulled out by the swishing and then trapped in the oil, leading to whiter teeth, fresher breath, and a host of other health benefits. Although there haven't been enough studies on oil pulling to determine if it's actually effective, one small study
found that it led to reduced levels of plaque and plaque-induced gingivitis after seven days of use. Try swishing a tablespoon of coconut oil around your mouth for 20 minutes daily, then spit and rinse well.
Another natural fix to consider: apple cider vinegar. Some people swear by gargling with a little apple cider vinegar in the morning to whiten teeth.