1. A dirty mouth
“Ninety percent of mouth odors come from mouth itself—either from the food you eat or bacteria that’s already there,” says Dr. Richard H. Price spokesman for American Dental Association. “Mouth odor is like any other body odor—the result of microbes living in the body giving off byproducts.” In the mouth, this means bacteria that normally live in the mouth interact with food particles, blood, tissue, etc., to create volatile (i.e., stinky) sulfur compounds. If you don’t clean properly, the bacteria build up, and next thing you know—that’s not toothpaste on your tongue.
2. A mouth out of balance
Certain mouth conditions can exacerbate bacterial growth and odor, such as gum disease and dry mouth. Gum disease causes bloody gums, creating more elements for those pesky bacteria to putrefy. But it is a dry mouth that is the more common cause of bad breath. Saliva helps flush out the mouth, keeping bacteria moving so they don’t settle down and multiply, while drier mouth is a breeding ground for bacteria. In spring and summer, allergy medications can dry you out; in winter, dry heat tends to be the culprit.
3. Stinky foods
If it stinks going in, chances are it’s going to stink coming out. The obvious offenders are onions, garlic, alcohol and tobacco. And foods don’t only create a stench in the mouth. “Plant oils are absorbed and the byproducts enter your bloodstream so you are actually breathing the odors out via your lungs three to four hours later,” says Jeannie Moloo, a registered dietitian and spokeswoman for the American Dietetic Association.
4. Not enough carbs
You look great after four weeks on Atkins, so how come you still can’t get a date? High-protein, low-carb diets cause your body to burn stored fats for fuel instead of carbs and can lead to a condition called ketosis. “As fat burns, ketones build up in the body, and some are released through breath,”explains Moloo. “Unfortunately ketones don’t smell particularly good.” And bad breath trumps six-pack abs.
5. Illness
Occasionally, bad breath can be a sign of a more serious illness. The most common systemic causes of bad breath are diabetes or GERD (or gastro esophageal reflux disease). Diabetes can also cause ketosis, and the resulting bad breath is sometimes one of first symptoms that lead to diagnosis. GERD is a backflow of acid from the stomach to the esophagus. Less common but possible are liver or kidney disease—when toxins from these organs are excreted through the lungs, causing bad breath.
Top 5 Cures
1. Keep it clean
Gum, breath mints, mouthwash… these are all helpful stopgaps, but they won’t cure bad breath. The way to get rid of bad breath for most of us is to brush, floss and tongue scrape twice a day. Yes, for fresh breath, the key is tongue scraping. “You can brush and floss till the cows come home, but it won’t help unless you get way back,” says Price of the American Dental Association. A tongue scraper is available at most drugstores. Price swears it helped him when he was suffering from bad breath (not something you want in your dentist, he points out). “Now I smell like a petunia,” he says. “For most of us, brushing, flossing and tongue scraping twice a day will control bad breath.”
2. Keep it moist
The best way to keep the right saliva balance is to drink plenty of water or liquids. To prevent dry mouth in winter, use a humidifier. If you snore or suffer from postnasal drip, try saline nasal spray to keep nasal passages moist.
3. Watch what you eat
Avoiding the main offenders (onion, garlic, tobacco, coffee, etc.) is the best way to avoid food-related bad breath. Dietitian Moloo also cites research that suggests certain foods can help: “Two cups of tea a day can prevent bad breath for some. The polyphenols, a plant chemical in tea, may prevent growth of bacteria responsible for bad breath.” You can also chew parsley, which seems to curb offending smells from other foods and bacteria. And cranberries may eliminate offensive smells and make the bacteria less sticky, which makes plaque less likely to form. Price says sugarless gums that contain xylotol may kill some bacteria and help reduce plaque.
4. Eat some carbs
Apparently the only way to help the ketosis caused by low-carb diets is… to eat some carbs. Moloo recommends fruits, vegetables and whole grains over frosted doughnuts.
5. See your doctor
If tongue scraping and carbo-loading doesn’t do the trick, check with your doctor to see if he or she suspects a more serious cause. Diabetes, GERD or other diseases require specific diagnoses and treatments.
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