Why does toothpaste make whatever you eat after brushing taste bad?

Question

What’s the property of toothpaste that makes some foods (orange juice is the classic example, I guess) taste SO bad if you eat right after brushing?

In: 60

Answer 1

In essence, toothpaste is kinda like soap, but with artifical sweetener to counteract the bitterness of ~soap.

When tasting the toothpaste, these flavours kinda cancle out, and you don’t really notice it.

But I believe that the huge amount of artifical sweetness makes your tongue lose sensitivity to lower levels to sweetness, and so foods that utilise sweetness taste as if they had almost no sugar.

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Compare it to how if you eat ice-cream, you get used to the cold somewhat, and then if you drink cool water, it feels warm.