The Conversation
A few drops of saliva can now reveal what used to require a scalpel, a syringe, or a scan. Scientists have developed ways to analyse spit for the tiniest traces of illness – from mouth cancer to diabetes, and even brain diseases like Alzheimer’s. This isn’t entirely new. Scientists first noticed the diagnostic potential of spit decades ago. What’s new is the speed and precision. Today’s techniques can detect subtle molecular shifts that would have been impossible to measure just a few years ago.
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