Why when you drink water when you’re really thirsty you feel better/hydrated instantly but in that moment hydration hasn’t even started?

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Why when you drink water when you’re really thirsty you feel better/hydrated instantly but in that moment hydration hasn’t even started?

In: Biology

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The moment you drink water, your sense of taste tells the brain more water is incoming and it actually releases some water early to flush the system, mostly from your fat reserves, which also double as water storage.

This is one of the functions your sense of taste has. Your body will also release glucose and fat early when you eat, before digestion kicks in, knowing reinforcements are on the way, to get you powered up and moving quicker than you might otherwise.

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