The eyes may be the window to the soul, but many scientists would say the mouth is the window to the body.
Saliva and other oral substances are now emerging as the bodily fluids of choice for physicians, dentists and drug testers, researchers said today at the 2005 Annual Meeting of the American Association for the Advancement of Science (AAAS). Saliva and other oral fluids (from the cheek and gum surfaces) contain many of the same proteins and other molecules that blood and urine do. Some of these molecules can reveal the presence of diseases such as cancer. Others can be used to predict the number of cavities in a persons teeth and perhaps even where in the mouth the cavities will develop, according to new research.
Saliva is also relatively easy to collect, since spitting into a cup doesnt require needles and can be done while a doctor or drug tester watches. As the panelists explained, researchers are making progress in both developing the technology for testing saliva and identifying the molecules, or "biomarkers," that reveal disease.
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