Question

why do we tend to drink more water after a salty meal ​

Answer 1

When the thirst center goes on alert because things are too salty and the body needs water to dilute the salt, that's when you start to feel thirsty. The kidneys help dilute the salt too by slowing down urine production and conserving water.

Answer 2

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As the saltier blood circulates through the body, it makes the fluid outside of our body cells saltier than the fluid inside the cells.

The cells notice the change right away. That’s because the extra salt outside acts like a magnet, pulling water out of the cells. The cells try to hold in the water and they send chemical messengers to the brain, protesting the saltiness of the fluid around them.

When the thirst center goes on alert because things are too salty and the body needs water to dilute the salt, that's when you start to feel thirsty. The kidneys help dilute the salt too by slowing down urine production and conserving water.