, a team of scientists from the Ottawa Hospital Research Institute and the University of Ottawa found that astronauts were destroying 54% more red blood cells during their 6-month missions onboard the International Space Station, or 3 million every second..
Before the new study, space anemia was thought to be a quick adaptation to fluids shifting into the astronaut’s upper body when they first arrived in space. “Thankfully, having fewer red blood cells in space isn’t a problem when your body is weightless,” Professor Trudel said.
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