Doctors raise grave health concerns about NASA astronaut after subtle clue in new photo

Doctors have raised concerns about astronaut Sunita Williams’ health after looking noticeably frail in a new photo.

NASA released photos of Williams, 59, and fellow astronaut Butch Wilmore, 62, walking gingerly and greeting shaking hands with NASA personnel after undergoing a series of health checks following their nine-month space saga. 

Doctors in particular pointed to Williams’ ‘visibly thin’ wrists, which they told DailyMail.com could be a sign of rapid weight loss, muscular wasting in her arms, and bone density loss.

The experts also noted the IV sticking out of Williams’ wrist is ‘most likely’ to help restore hydration and electrolytes, as microgravity tricks the body into eliminating necessary fluids, causing dehydration. 

Striking before and after pictures of Williams show her with noticeably grayer hair, deeper wrinkles, and a more gaunt face. 

But experts suggest the fact that the duo are already walking less than 24 hours after returning is promising – some feared they…