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1   DD214   2022 Dec 8, 1:01pm  

On the surface, the composition of our blood is similar to that of sea water. Let's look at this a bit closer. Both have salts – sodium, chlorine, magnesium, sulfide, calcium and potassium. But, the concentration of salts in sea water is much higher than it is in blood – about 3 times as high.

https://oceanrescuespa.com/pages/body-ocean-relationship

Why can't humans drink sea water?

https://biology.stackexchange.com/questions/3909/why-cant-humans-drink-sea-water
2   HeadSet   2022 Dec 8, 2:57pm  

Patrick says

Given that human blood has the same salt concentration as seawater, why can't people survive by drinking seawater?

Isn't the blood of modern land animals similar in salinity to the seawater that existed back when animals first went on land?
3   Ceffer   2022 Dec 8, 6:38pm  

It's the same salinity as historical rather than recent sea water? You can drink sea water if it is diluted one part fresh water with two parts sea water (I think) as a survival strategy, but I don't know for how long.
4   rocketjoe79   2022 Dec 9, 9:30pm  

you can drink your own pee for a while too. Less salty than salt water generally.
5   AD   2022 Dec 9, 9:38pm  

Sea water is too much salinity for the human. However a cheap and large enough solar still can convert the sea water to fresh water.

.
6   Misc   2022 Dec 9, 9:42pm  

Doesn't that stuff just dilute the whiskey?
7   HeadSet   2022 Dec 10, 12:41pm  

ad says

Sea water is too much salinity for the human. However a cheap and large enough solar still can convert the sea water to fresh water.

.

The Air Force used to include a solar still as survival equipment in the planes. It was an inflatable the size of a beachball. It took several hours to distill a half cup of drinking water.
8   AD   2022 Dec 11, 12:51pm  

MIT designs $4 desal system that provides enough water for a family

https://bigthink.com/the-future/solar-desalination-water

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