How is it that cordials, juices, sodas that are made of over 80-90% water don’t seem to hydrate or quench thirst unlike drinking pure water?
In: Biology
They do, just not as much.
This is because filtration in the glomerulus in the kidneys is decided by osmotic pressure, and that osmotic pressure is decided in part by the presence of larger molecules like sugar in the blood. All of those things contain a lot of sugar and other large molecules that increase osmotic pressure on the side of your blood, thus pushing more water out of your blood and out as urine.
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