In the truth of things, nope, why you may ask? Well, the mouth is home to tons of microscopic life forms known as bacteria that normally don’t do anything and just live there as they have for millions of years. These bacteria feed on leftover food in-between teeth, in between the gums, and on the tongue causing bad breath at the slightest neglect of the daily dental hygiene regimen. The smell comes from the bacteria as they produce noxious gasses as they eat away at their favorite food. They also produce acids that eats away the teeth leading to tooth decay.
Having tooth decay, worsens the bad breathe problem because it offers bacteria a lot of nooks and crannies to hide so that even brushing and gargling cannot reach. The mouth is a very dirty place but not to worry, any bacteria that happens to pass through into the digestive tract is destroyed within the stomach with it’s powerful acids and digestive enzymes. This has been a proven design of the human body that protects us from these nasty bacteria getting into the bloodstream causing infections and other health problems.