"Teeth represent only 10 percent of the surface of your mouth and bacteria live throughout the whole mouth. When you stop brushing, bacteria left behind resettle on your teeth and gums. Oil pulling reaches virtually 100 percent of the mouth, thereby affecting all bacteria, viruses, fungi, and protozoa in the mouth."
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Source : Bruce Fife (2017). “Oil Pulling Therapy: Detoxifying and Healing the Body Through Oral Cleansing”, p.89, Piccadilly Books, Ltd.