3. Oil Up Your Smile – To achieve healthier gums and cleaner teeth naturally, Tara Levesque-Vogel, D.M.D., of Levesque Family Dentistry in Nashua, New Hampshire, advises an ancient Indian Ayurvedic practice called “oil pulling.” She says it’s surprisingly potent. The technique involves swishing the mouth with coconut oil, and it’s been found to be more effective than antibacterial mouth rinses in killing bacteria.