This type of research is called "salivanomics."
Unlike blood tests, saliva tests are painless and are apt to encounter less resistance. Also, since no needles are used the risk of infection or contamination are minimal or non-existent. According to Dr Wong, about 20 percent of Americans visit their dentists more frequently than their doctors, so dentists could join the front lines of disease prevention. Dentists could also offers these tests to patients who are wary of visiting their doctor's office or to those who don't receive regular medical care.
As salivanomics advances, doctors may be able to use your saliva to screen for cancers, diabetes, and autoimmune disorders. It's also possible that testing centers may offer saliva tests via mail since you can perform the tests at home and there's no need to send blood via the mail. Many people fear needles or going to the doctor needlessly, but such services may soon make the whole process painless and convenient.
http://www.GalleriaFamilyDental.com is the website of Henderson dentist Stephen Hahn, DDS. His dental practice offers various preventative and cosmetic treatments.