You may be able to prevent two of the most common diseases of modern civilization, tooth decay (caries) and periodontal (gum) disease, simply by improving your diet. Decay results when the teeth and other hard tissues of the mouth are destroyed by acid products from oral bacteria. Certain foods and food combinations are linked to higher levels of cavity-causing bacteria. Although poor nutrition does not directly cause periodontal disease, many researchers believe that the disease progresses faster and is more severe in patients whose diet does not supply the necessary nutrients.

Poor nutrition affects the entire immune system, thereby increasing susceptibility to many disorders. People with lowered immune systems have been shown to be at higher risk for periodontal disease. Additionally, research shows a link between oral health and systemic conditions, such as diabetes and cardiovascular disease. So eating a variety of foods as part of a well-balanced diet may not only improve your dental health, but increase fiber and vitamin intake may also reduce the risk of other diseases.