The participants in the study were randomly assigned to eat a more healthy diet, as well as a more unhealthy diet, where the latter contained, among other things, higher levels of sugar and saturated fat, as well as more semi-finished products.
The result was that sleep became more superficial, which in turn can affect both metabolism, immune system and memory.
What's new about this study?
"Studies have shown that diets containing sugar, for example, cause poorer sleep, but no study has previously investigated what happens if we humans eat an unhealthy diet, so to speak, and compare it with what sleep looks like after a healthy diet," says Jonathan Cedernaes, physician and associate professor of medical cell biology at Uppsala University.
In the clip above you can see what the lab looks like where the research was conducted.