Ăn chocolate giúp răng chắc khoẻ?
Để có một nụ cười tươi tắn, hãy chải răng sau các bữa ăn, dùng chỉ nha khoa thường xuyên và ăn thật nhiều chocolate, một nhà nghiên cứu tại Đại học Tulane, Mỹ, tuyên bố như vậy.
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