What can your spit tell you about your DNA?

Doctors always want your blood, but one day, a health care professional may ask you to open up and say, "Ptooey!" Why? Your spit holds a mother lode of biological information.

Biotechnology 101 Protocol: DNA Extraction from Saliva

What can your spit tell you about your DNA?

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23andMe DNA kits are over 50% off on Prime Day (Update: Expired)

Genetic Science, HowStuffWorks

Before you send your spit to 23andMe, what you need to know

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False claim circulates on Facebook that plant seeds can restructure their DNA if you spit on them