13 May 2020 --- Astronauts excrete less sodium in space than on land, which could have major implications for the heart health of future space travelers. This is according to the American Heart Association (AHA), whose journal, Circulation, has published a new study focusing on cardiac natriuretic peptides, a hormone that helps the body urinate out sodium. The researchers say their study was the first to measure these peptides in astronauts eating a high-sodium versus low-sodium diet in space and on Earth.
