Science of sweetness: cats can’t taste sweet and some sweet things don’t make you fat


Hank Green, from SciShow, explains how the science of sweetness works out and how we are able to taste things. Using the taste receptors in out tongue we can taste things form around us and we usually choose sweet and salty and avoid bitter or sour tastes.

Sour and bitter are avoided because they are signs of dangerous substances.

There are animals that cannot taste sweets: cats. This is because a certain gene is missing from their DNA. They are sweet in themselves and thus they don’t need to taste sweet, eh?

Also, sweet substances that our body cannot process, but it can taste, are not a source of calories. Usually food additives that give sweet taste will not make you fat, because they are not absorbed by the body and thus they are not transformed into energy.

However, too much of that sweet stuff and your brain will not be able to control your body when it finally meets a sweet substance that can be actually transformed into fats.

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