In a fast-paced society Irwin where fast food seems to dominate the food chain may mean a great deal of oral health - with poor food choices that can even have negative effects on the teeth. In fact, minerals and nutrients are crucial to people's diets in order to keep the tissues of the body from infecting and keeping their teeth healthy. According to an article in the March 2007 issue of AGD Impact, an article in the college's news magazine states that any excess or low nutrient levels can have detrimental effects, especially on the mouth and teeth, and May cause oral illness and infection. General Dental (AGD).