I don’t believe you can figure out the water content of a living human. And if you can, I don’t want to know how.
You could just weigh a mummified body instead, figure out how much a living person of the same sex and height would weigh, and the difference would be water. (Not accounting for the internal organs that were removed during mummification).
Better quality version:
Source: Instagram
People have said the fact is derived from experiment done on live human subjects by the WW2 Japanese torture unit, Unit 731.
I don’t believe you can figure out the water content of a living human. And if you can, I don’t want to know how.
You could just weigh a mummified body instead, figure out how much a living person of the same sex and height would weigh, and the difference would be water. (Not accounting for the internal organs that were removed during mummification).