ELI18 I guess
In: Biology
It’s all about the enzymes: amino acid protein chains.
Your spit is loaded with such enzymes, because spit is designed to help lubricate your food, so that your food slides down your esophagus more easily.
Where-as regular tap water does NOT contain all those enzymes.
(At least it shouldn’t! If it does–definitely don’t drink that water!)
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