For better metabolic control, do not drink coffee before breakfast


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According to a new study, a strong, black coffee can control blood sugar levels to wake you up after a bad night’s sleep.

Research from the Center for Nutrition, Exercise and Metabolism at Bath University (UK) looked at the effects of broken sleep and morning coffee during a range of different metabolic markers.

I am writing British Journal of Nutrition Scientists point out that one night of poor sleep has a limited effect on our metabolism, drinking coffee as a way to boil it from a slumber can have a negative effect on blood sugar (sugar) control.

Given the importance of keeping our blood sugar levels within a safe range to reduce the risk of conditions such as diabetes and heart disease, he says these results are ‘far-reaching’ especially given the global popularity of coffee. Health effects can occur.

For their study, physiologists at the University of Bath asked 29 healthy men and women to undergo three different overnight experiments in random order:

  • In one, participants in the condition had a normal night’s sleep and were asked to consume a sugar drink when they woke up in the morning.
  • On another occasion, participants experienced an interrupted night’s sleep (where the researchers woke them up for five minutes every hour) and were then given the same sugar drink upon waking.
  • On another, participants experienced the same sleep disruption (i.e. waking overnight), but this time a strong black coffee was given 30 minutes before the first sugary drink was consumed.

In each of these tests, blood samples were taken from the participants after a glucose drink, which showed in energy content (calories) what can usually be eaten at breakfast.

Their findings suggest that one night of interrupted sleep did not worsen participants’ blood sugar / insulin responses compared to a normal night’s sleep. Past research suggests that taking several hours of sleep over one and / or several nights can have a negative metabolic effect, so it is reassuring to learn that a night of fragmented sleep (eg due to insomnia, noise disturbances, or a new baby) is not. Have the same effect.

However, consuming strong black coffee before breakfast increases the blood sugar response in breakfast by about 50%. Although population-level surveys indicate that coffee can be associated with good health, previous research has previously demonstrated that caffeine causes insulin resistance. This new study suggests that the usual way to drink coffee after a night’s sleep can solve the problem of sleeplessness, but can create another by limiting your body’s ability to tolerate sugar in your breakfast. is.

Professor James Bates, co-director of the Center for Nutrition, Exercise and Metabolism at the University of Bath, who oversees the work, explains: “We know that about half of us will wake up in the morning and drink coffee, before doing anything – In fact, the stronger we feel, the stronger the coffee. The study is important and has far-reaching health implications because so far we have limited knowledge of what it is doing for our body. , Especially control for our metabolism and blood sugar.

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

Lead researcher, Harry Smith Department for Health at Bath, said: “These results suggest that one night of sleep alone does not impair participants’ blood sugar / insulin response to a sugary drink compared to a normal night of sleep Many of us do. However, starting a day after a poor night’s sleep with a strong coffee has a negative effect on glucose metabolism by about 50%.

“As such, individuals should try to balance the potential stimulant benefits of caffeinated coffee in the morning with the ability to have high blood sugar levels, and it may be better to consume coffee after breakfast than before.

“We need to learn more about the effects of sleep on our metabolism, such as how essential is sleep disturbances to impair our metabolism and what are some of its long-term effects, as well as how to exercise “For example, it can help combat something. ”

This week is celebrated as International Coffee Day (1 October) to celebrate the widespread appeal of coffee worldwide. Coffee is now the world’s most popular drink, consuming around two billion cups every day. Almost half of people in the US are over 18 years of age and drink coffee every day, while in Britain, according to the British Coffee Association, 80% of households buy instant coffee for home consumption.


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more information:
Harry A. Smith et al., Glucose control at waking is unaffected by fragmentation of hourly sleep during the night, but impaired by caffeinated coffee in the morning, British Journal of Nutrition (2020). DOI: 10.1017 / S0007114520001865

Provided by University of Bath

Quotes: For better metabolic control, do not drink coffee before breakfast (2020, 30 September) from 1 October 2020 https://medicalxpress.com/news/2020-09-cfish-breakfast-metabolic.html

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