"Even though the saliva lacks the drama of blood, sincerity of sweat, emotions of tears saliva should be used as biomarker to detect pregnancy, diabetes mellitus, oral pre cancer & cancer, infectious diseases and also to catch the suspect by eliciting DNA from saliva over the bite marks in forensic odontolgy.This may allow a diagnosis of cancer to be made at an earlier stage, giving patients more choice in various treatment options. Doctors hope that, advancements in salivary diagnostics in the future will replace invasive biopsies and provide new avenues in early detection and diagnosis.It is a perfect medium for surveillance of health and disease. Saliva is ideal for screening premalignant and malignant oral neoplasms because of its anatomical poximity.Saliva contains specific biomarkers associated with either a healthy or diseased state."