Everything you wanted to know about spit

Researchers have identified all 1,116 unique proteins found in human saliva glands, a discovery that could usher in a wave of convenient, spit-based diagnostic tests that do not require a single drop of blood. The researchers hope that saliva-based tests could eventually be used to diagnose cancer, heart disease, diabetes and a number of other conditions.

There are already saliva-based tests to detect human immunodeficiency virus, or HIV, and hepatitis infections. Furthermore, other research groups are developing saliva-based tests for breast cancer, based on the detection of a specific protein fragment. Read more here.

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