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Key Facts In This Video
Mouth bacteria aren't all bad. Some cause cavities and gum disease, but others can protect against more dangerous bacteria. 00:27
Your saliva usually keeps bacterial colonies under control, but at night, you don't produce as much saliva. 00:39
Bacteria produce odor-causing compounds as waste products, including hydrogen sulfide, methanthiol, isovaleric acid, and cadaverine. 01:02