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Monday, November 28, 2022
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Wow Fact: Your blood is as salty as the ocean

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The percentage of salt in our bodies is very close to that of the ocean, so just how salty does that make us?

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The human body contains many salts, of which sodium chloride (AKA common table salt) is the major one, making up around 0.4 per cent of the body’s weight at a concentration pretty well equivalent to that in seawater.

So a 50kg person would contain around 200g of sodium chloride – around 40 teaspoons. Since we lose salt whenever we sweat, it has to be continually replaced.

While excessive consumption of it has been linked to high blood pressure and stomach cancer, salt is a vital part of body chemistry, playing a key role in many functions, from the quality of blood to the transmission of nerve signals.

inputs: BBC Science

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