India, May 14 -- A large study of about half a million UK Biobank participants has linked both short and long sleep with faster biological ageing across several organs.

Researchers found the lowest signs of biological ageing among people who reported sleeping roughly six to eight hours a day.

The study used 23 ageing clocks across 17 organ systems, including the brain, heart, lungs and immune system.

The findings do not prove that sleep duration directly causes faster or slower ageing, but suggest sleep is closely tied to health across the body.

Too little sleep, and possibly too much, may be linked to faster ageing in the brain, heart, lungs, immune system and other parts of the body, according to a new study.

The research, publishe...