by Ryan Prosser, Daily Mail:

Those of us who enjoy a weekend lie-in are about to get some news that may keep us awake at night – sleeping in may not be good for your health, a study has found.

New research has discovered that different sleep patterns from weekdays to weekends can actually increase gut bacteria linked with obesity, heart attacks and strokes.

Just an extra 90 minutes in bed is enough to disrupt our internal body clock, affecting a range of functions from our immune to digestive systems, scientists believe.