Health risks associated with screen time, such as cancer and cardiovascular disease, were at their lowest when daily TV time was two hours or less.
The study from the University of Glasgow, followed almost 500,000 participants aged 37-73 over a 12 year period between 2006 and 2018.
Researchers said the findings mean adults should minimize exposure.
If all participants limited television time to two hours a day, potentially 5.62% of all deaths and 7.97% of deaths due to cardiovascular disease could have been prevented or delayed.
