The process of chewing sugar-free gum helps the mouth to produce more saliva – the mouth’s natural defence against acid; it usually takes our saliva about an hour to replace the minerals that the enamel has lost after eating. But chewing sugar-free gum for 20 minutes after eating or drinking increases the flow of saliva, and helps replace the minerals more quickly. Brushing for two minutes twice a day is still the best way to keep teeth clean and healthy, chewing sugar-free gum during the day can be effective in neutralising harmful plaque acids and reducing the risk of decay.
Source: Oral Health Foundation
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