People who stay up later at night could be more at risk of developing type 2 diabetes and heart disease, according to a new study.
New research, by scientists at Rutgers University in New Jersey, found that "early birds" who go to sleep and wake up earlier have differently programmed body clocks which allow them to process fat easier.
Because these people are more active during the day, they use more fat as an energy source compared to those who rise later in the day - so for "night owls", fat builds up in the body easier.
