1 to help remove dental plaque.

Malic acid in apples helps to dissolve substances that cause tooth coloring.

2. Help clean up food residue

Apples are rich in cellulose. Linda Nelson, a professor at the School of Dentistry at Baylor University in Texas, suggested that chewing foods rich in cellulose after meals can clean up the residue in teeth.

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/sc . people . com . cn/GB/N2/20 16/ 1027/c 3455 1 1-292 1 1930 . html " target = " _ blank "。 People's Daily Online "Eating too many apples and carrots seems to have used whitening stickers"

/mcq . people . com . cn/m/CQ/news . cqr 300？ Num = 7676926 "target =" _ blank "title =" People's Daily Seven Tips for Protecting Teeth: Flossing "> People's Daily Seven Tips for Protecting Teeth: Flossing.