After a bad night’s sleep and little rest, it is very common for a cup of coffee to be the first thing we do. But a study now reveals that not such a good idea.

The study, prepared by the Bath University, in the United Kingdom, and published by the British Journal of Nutritionreveals that a strong black coffee as soon as we wake up can negatively affect our blood sugar levels.

The researchers asked 29 healthy men and women to undergo three different nighttime experiments in random order.

In one of the experiments, the participants had a normal night’s sleep and they were asked to consume a sugary drink upon waking up in the morning.

In another of the tests, participants experienced an interrupted night’s sleep (the researchers woke them up every hour for five minutes) and then, upon waking, they were given the same sugary drink as the first ones.

In the third experiment, the participants experienced the same sleep disruption (that is, they woke up during the night), but this time it was given first a strong coffee about 30 minutes before consuming the sugary drink.

In each of these tests, blood samples from participants after the sugary drink, which in energy content (calories) reflected what was normally consumed in a normal breakfast.

Researchers found that a disrupted night’s sleep did not worsen participants’ blood glucose responses at breakfast compared to a normal night’s sleep, when previous research suggested losing many hours of sleep over one or several nights could have negative metabolic effects, so they consider it good news to know that a single night of fragmented sleep (for example, due to insomnia, noise disturbances or a newborn baby) does

In contrast, strong coffee consumed before breakfast substantially increased the blood glucose response by approximately a 50%. Although there are studies that indicate that coffee may be linked to good health, previous research has shown that caffeine has the potential to cause insulin resistance. So this new study reveals that drinking coffee after a bad night’s sleep can solve the problem of drowsiness, but could create another by limiting your body’s ability to tolerate sugar at breakfast.

According James Betts, Coordinator of the research, “we know that almost half of us will wake up in the morning and, before doing anything else, have a coffee. The more tired we feel, the stronger the coffee. This study is important and has implications powerful for health, as until now we had limited knowledge about what this is doing to our bodies, in particular for our metabolic and blood sugar control. “

“Simply put, our blood sugar control is affected when the first thing our body comes into contact with is coffee, especially after a night of interrupted sleep. We could improve this by eating first and foremost. later drinking coffee later if we feel we still need it. Knowing this can have significant health benefits for all of us, “Betts adds.