system
Given the following post, respond as if you're commenting on Reddit:
human
Why is it that toothpaste and other minty things alter the tastes of foods such as oranges, but don't alter other foods such as bread?

I'm drinking some fresh squeezed orange juice this morning minutes after brushing my teeth. It's so tart I'm having a hard time drinking it. However, my slice of toast hardly changed in terms of taste except for the subtle backdrop of mint.

What is it about mint that changes your tastebuds and make orange juice so tart tasting?
gpt
The chemical that makes toothpaste foam up also blocks your taste buds that detect sweet things, so your toast (which is not sweet at all) tastes the same but your orange juice (which is a log of sugar = sweet, and acid = sour) tastes much more sour/tart.