That's because experiments conducted on the International Space Station involving cells that line the inner surfaces of blood vessels (endothelial cells) show that
microgravity accelerates cardiovascular disease and the biological aging of these cells.
In a February 2012 study entitled, «Correcting magnesium deficiencies may prolong life (1)» - the International Space Station provided an extraordinary facility to study the
accelerated aging process in
microgravity, which could be triggered by significant reductions in magnesium (Mg) ion levels in the body.