A strong cup of coffee first thing in the morning to wake up and get going is the preferred way to overcome a bad night of sleep by most people around the world. However, a new study has found that drinking coffee first thing in the morning before breakfast after a bad night’s sleep can be detrimental to your health by making you more insulin resistant and by raising your body’s glucose levels.
In the study, 29 adults were asked to randomly experience three different overnight experiments. One night, the participant had a good night’s sleep and then the participant was given a sugary glucose drink in the morning (to replicate the calories from a meal). Another night the participant had to endure a disruptive night’s sleep, which was achieved by waking the participant every hour for 5 minutes throughout the night. In the morning, a sugary drink was given first thing upon waking. The third night also involved a disruptive night’s sleep, but this time the participant was given a cup of strong, black coffee upon waking and then a sugary drink. A blood test was taken after each night’s experiment, after the sugary drink, to see the subject’s glucose levels and to measure their insulin response.