And that's why they lose weight
Astronauts were known to lose weight during their stay on the International Space Station, but the motive was unknown to date. And now, a specialist at NASA's Nutritional Biochemistry Laboratory has discovered what the motive may be.
And it is none other than the fact that the food eaten by astronauts floats in their stomachs as a result of microgravity. This causes the brain to feel that it is already full when it hits the walls of the organ and sends signals to cut off the appetite. For that reason, astronauts may believe they are satiated much earlier than normal, and do not eat enough, leading to a lower intake of the necessary nutrients.
It seems a feasible explanation, although it still needs to be corroborated more precisely. However, it is a good indication that our stomach does not adapt well enough to life in space. It should also be noted that the problem of weight loss in astronauts is not merely anecdotal, as it also affects their muscle and bone mass.