Researchers argue that it's better to drink coffee 'after breakfast' than before breakfast
https://www.cambridge.org/core/journals/british-journal-of-nutrition/article/glucose-control-upon-waking-is-unaffected-by-hourly-sleep-fragmentation-during-the-night- but-is-impaired-by-morning-caffeinated-coffee / 398A3EDA8C30EC89ADBB4C74C8E244B0
Many people will say, 'Drink strong coffee and wake up in the morning of lack of sleep.' However, 'If you drink coffee before breakfast, your ability to control blood sugar levels will be impaired, so if you drink coffee, after breakfast. The research result was announced.
Glucose control upon waking is unaffected by hourly sleep fragmentation during the night, but is impaired by morning caffeinated coffee | British Journal of Nutrition | Cambridge Core
Drink coffee after breakfast, not before, for better metabolic control | EurekAlert! Science News
A research team at the University of Bath in the United Kingdom investigated the effects of sleep deprivation and coffee after waking up on blood sugar levels. Keeping blood sugar in a safe range is important to reduce the risk of diabetes and heart disease, and the impact of coffee enjoyed by people around the world on blood sugar is relevant to the health of many. The research team points out.
The research team gathered 29 healthy adult men and women who were asked to sleep and drink in a variety of conditions and analyzed the changes in blood glucose levels that accompanied them. The subjects reportedly performed the following three patterns of sleep and beverage intake in a random order.
・ 1: Get a normal sleep and drink a sweet drink that contains the same calories as a general breakfast one hour after waking up in the morning.
・ 2: During sleep, researchers intervene every hour to keep them awake for 5 minutes, and drink the same sweet drink as “・ 1” 1 hour after waking up in the morning.
・ 3: During sleep, researchers intervene every hour to keep them awake for 5 minutes, and 30 minutes after waking up in the morning, drink strong black coffee containing about 300 mg of caffeine, and 30 minutes later. Drink the same sweet drink as '・ 1'.
The blood glucose levels of the subjects were measured based on blood samples taken after drinking a sweet drink to assess the effects of sleep deprivation and black coffee on blood glucose control.
As a result of the experiment, it was found that the control of blood glucose level ( insulin resistance ) when sleep was disturbed overnight was not worsened than when normal sleep was taken. Previous studies have shown that if you don't sleep for a day or days, your metabolic response, including blood sugar control, is adversely affected, but our results show that even if your sleep is fragmented for only one night. It shows that there is no adverse effect on blood sugar control.
However, when he drank strong black coffee 30 minutes after waking up after his sleep was fragmented, it was found that the increase in blood sugar level due to the drink was 50% larger. In short, drinking black coffee before breakfast to help you get drowsy can worsen your insulin resistance and limit your ability to control your blood sugar levels, the researchers say.
'We know that almost half of us drink coffee when we wake up in the morning before doing anything else. Intuitively, coffee is so tiring that we feel tired,' said Professor James Betts of the research team. Will be stronger, 'he said, pointing out that this study is important for understanding the relationship between black coffee and blood sugar levels.
'Simply put, if we drink coffee first, especially after a sleep-disturbed night, we lose control of our blood sugar levels. We have breakfast first, and then You can remedy this problem by drinking coffee if you still need it. ' Harry Smith , the lead author of the paper, also said, 'People need to balance the potential stimulating effects of coffee they drink in the morning with the potential for elevated blood sugar levels. Drink coffee before and after breakfast. It might be better. '