NASA astronauts Butch Wilmore and Suni Williams returned to Earth after a nine-month mission aboard the International Space Station, surprising many with their altered appearances, notably grey hair. Research suggests that microgravity affects hair growth and increases oxidative stress in cells, potentially causing grey hair. Health concerns regarding possible weight loss and the overall impact of prolonged space exposure on the body were highlighted during their stay. Their return raises important questions about human physiology in space amidst changing perceptions and reactions to their appearances on social media.
Scientists say that space really can change your hair, as microgravity interferes with hair growth and causes oxidative stress that may lead to greying.
Williams' previously vibrant hair has turned grey after nine months in space, highlighting the unforeseen effects of prolonged space exposure on human physiology.
Some studies suggest that microgravity leads to genetic changes in hair follicles that suppress growth and contribute to oxidative stress.
Even during their stay, health experts expressed concern over the astronauts' potential weight loss and the dramatic changes in their physical appearance.
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