Mouth-dwelling bacteria. The bacteria living in your mouth and tongue feed off of carbohydrates in your diet, and as they flourish they produce odorous gases – this is what you are inhaling when you smell bad breath. To make matters worse, when left to thrive this bacteria will coat your teeth and gums in plaque, which can in turn lead to painful conditions like gingivitis (early stage gum disease), periodontal disease and even tooth loss
Dehydration. A dry mouth is another prime offender when it comes to less-than-fresh breath. It’s why most of us suffer from ‘morning breath’ when we wake up - the body has a natural tendency to lower the flow of saliva while we sleep. There’s not much we can do about morning breath, but external factors like alcohol, coffee and prescription medication are all responsible for inhibiting saliva production, causing a dehydrated mouth and giving odour-causing bacteria the perfect environment in which to thrive.
Smoking. When you smoke, carcinogenic particles are left in your throat and mouth, causing an unpleasant smell sometimes referred to as ‘smoker’s breath’. Smokers are also at greater risk of developing periodontal disease, giving you an even more compelling reason to quit the habit.