Everyone worries about bad breath from time to time, especially after a garlicky meal or a cup of coffee. In fact, according to the Harvard Health blog, approximately one-third of people say bad breath is sometimes a problem. It’s also one of the top reasons people go to a dentist.

What causes bad breath?

Coffee, alcohol, onions, and garlic can all cause bad breath, as can low-carb diets like Paleo and Atkins. Yet experts agree that the number one reason people suffer from chronic bad breath - also known as halitosis - is poor oral hygiene.

Millions of bacteria live below the gumline and on the back of the tongue. If teeth are not regularly and properly cleaned, bacteria will eat off the proteins and food particles in the mouth and release gases known as volatile sulfur compounds.

The result? Cavities, periodontal (gum) disease and bad breath odour, said dentist Dr Steven Goldberg.

When bad breath is persistent, experts say it’s likely a symptom of a more serious health problem. About 10 percent of people with bad breath may have an illness - like an infection, pneumonia or bronchitis - due to a problem with the nasal cavity, sinuses, throat or tonsils. Some may have gastroesophageal reflux disease (GERD), diabetes, or liver or kidney conditions. An overgrowth of yeast in the mouth, known as oral candidiasis or thrush, can also be a source of bad breath. It is usually treated with antifungal medicine.

Here are some easy ways to give bad breath the brush off.

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