May 27, 2025
Saliva testing: The next big thing in medicine
Siddhartha JanaSaliva as a diagnostic tool
Spit can now reveal diseases like cancer, diabetes, and Alzheimer’s—offering a painless, easy, and affordable testing method.
Source: Canva
Not a new discovery
Saliva’s diagnostic potential has been known since the 1980s, used for detecting hormones, drugs, and later HIV.
Source: Canva
Precision has improved
Modern tech detects tiny molecular changes in saliva that were previously undetectable, boosting test accuracy and speed.
Source: Canva
Detects multiple diseases
Saliva contains DNA, RNA, proteins, and fats that shift during illness—helping detect heart disease, Parkinson’s, and more.
Source: Canva
Alzheimer’s and cognitive clues
Studies show saliva can spot early signs of Alzheimer’s by identifying changes in those with mild cognitive impairment.
Source: Canva
Dentistry gets smarter
Spit is now being studied for early detection of gum disease and tooth decay risk during dental checkups.
Source: Canva
Raman Spectroscopy
This light-based tech reads chemical "fingerprints" in spit, helping detect diseases like cancer even before symptoms start.
Source: Canva
Easy and accessible
Spit tests are simple, painless, and can be done at home—ideal for people with limited healthcare access or fear of needles.
Source: Canva
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