Coffee before or after breakfast? – Specialized naturopathic and naturopathic portal

Why you should have breakfast before coffee

For many people, the morning begins with coffee – before anything has even been eaten. However, according to a recent study, it could be detrimental to health.

Many people first have coffee in the morning. From a health point of view, isn’t that a good idea? (Image: amenic181 /

Drinking coffee after a sleepless night seems to cause blood sugar problems, hence the result of the new study with the participation of researchers from the University of Bath. The results can be found in the English journal “British Journal of Nutrition”.

Link between sleep and blood sugar

Current research has examined the effects of sleep disturbances and morning coffee on a number of different metabolic markers. A night with trouble sleeping on its own has been shown to have limited effects on metabolism, but drinking coffee after sleep can have a negative influence on blood sugar control.

Keep your blood sugar under control

Since keeping blood sugar levels within a safe range is important to reducing the risk of diseases like diabetes and heart disease, morning coffee could have far-reaching health effects.

Various experiments have been carried out

For the study, 29 healthy men and women were asked to undergo three different experiments overnight in random order. In one of the experiments, participants had a normal night’s sleep and were asked to wake up in the morning to drink a sugary drink with an energy content (calories) equivalent to what would normally be consumed for breakfast.

In another experiment, participants’ sleep was deliberately disturbed (the researchers woke them up every hour for a period of five minutes) and they were given the same sugary drink in the morning after they woke up.

In the third option, sleep disturbances were also simulated, and participants were given strong black coffee 30 minutes before consuming the sugary drink.

In each of these tests, blood samples were taken from the participants after the sugary drink and the blood sugar level was measured.

Does coffee promote insulin resistance?

Strong black coffee drunk before breakfast increased the glycemic response to breakfast by about 50 percent. Although population-level surveys suggest that coffee may be generally associated with good health, this confirms the suspicion that caffeine also has the potential to cause insulin resistance.

Frequently disturbed sleep problems

Previous research has suggested that losing several hours of sleep over one and / or more nights can have negative metabolic effects. It’s reassuring that a single night with poor sleep doesn’t have the same effect, the researchers say. Coffee afterwards, however, could have adverse consequences.

The results show that a night’s sleep disturbance alone did not worsen participants’ glycemic-insulin response to the sugary drink. However, starting the day with strong coffee after a bad night’s sleep had a clearly negative impact on glucose metabolism, experts sum up.

Problems with morning coffee

Many people drink coffee in the morning. And often the following applies: the more tired the affected person feels, the stronger the coffee. Drinking coffee in the morning after a bad night’s sleep can help fight fatigue, but it creates another problem: It can limit the body’s ability to tolerate sugar for breakfast, the researchers say.

Drink coffee only after breakfast

“Simply put, our blood sugar control is compromised the first time our body comes into contact with coffee, especially after a sleepless night. We could improve this by eating first, then drinking coffee later, ”Professor James Betts said in a press release from the University of Bath. (as)

Author and source information

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This text conforms to the requirements of specialized medical literature, medical directives and current studies and has been verified by health professionals.


Harry A. Smith, Aaron Hengist, Joel Thomas, Jean-Philippe Walhin, Philippa Heath et al .: Waking glycemic control is not affected by the hourly fragmentation of sleep at night, but is altered by coffee caffeinated in the morning, in British Journal of Nutrition (published June 1, 2020), British Journal of Nutrition University of Bath: Drinking coffee after breakfast, not before, for better metabolic control (published September 30, 2020), University of Bath

Important note:
This article is provided for informational purposes only and should not be used for self-diagnosis or self-treatment. It cannot replace a visit to the doctor.