A pair of “rush hours” every day rapidly change the way tissues throughout the body work, scientists have discovered.
The animal study, in Proceedings of the National Academy of Sciences, monitored the function of cells, in 12 tissues, through the day.
It found large shifts in activity just before dawn and dusk.
Experts said the findings could help time medication to hit sweet-spots in the body clock.
The body’s internal clock is known to drive huge changes – it alters alertness, mood, physical strength and even the risk of a heart attack in a daily rhythm.