My mom was telling me that if I put the unfinished bowl of milk and cereal back to the fridge, the saliva that has been stuck to the spoon gets passed to the milk. The saliva in milk will make milk go bad faster than if there were no saliva inside. Is that true? If so, how comes? It would be great if there are scientific evidences or references to back it up.

I have found a Quora post having some people saying that it will make the food go bad faster. I was not able to find any other references

  • $\begingroup$ It is the bacteria in the saliva , not the saliva itself. $\endgroup$ Jan 25, 2021 at 17:07
  • 1
    $\begingroup$ What research have you done on your own to try to answer your question? Please edit your question and tell us where you've looked for answers, what you do know about the topic, and where exactly you still have questions. Our goal is not to simply be an answer site, but rather a site that promotes self-learning with some expert help along the way. $\endgroup$
    – MattDMo
    Jan 26, 2021 at 2:55


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