Drinking coffee in the morning is a waste: it has poor refreshing effect and hurts stomach

Make a cup of coffee at work, smell mellow aroma, bitter aftertaste, with the help of caffeine to awaken work passion, seems to be a good choice. So, do you know when coffee is the most refreshing? How many cups of coffee should I drink in a day? In addition to dispelling fatigue, what other "surprise" effects can coffee bring to our bodies? The editor of China Economic Network has collected practical knowledge about coffee drinking for office workers. If you like it, come and have a look.

With the popularity of coffee culture in China, many urban white-collar workers choose to get up and enjoy a cup of mellow coffee in the morning light, opening the prelude to a busy day. China Economic Network editor channel summary experts suggested that, in fact, before breakfast, breakfast is not the best time to drink coffee, not only may affect gastrointestinal health, but also can not maximize the refreshing effect of caffeine.

Drinking coffee before breakfast can cause gastric ulcer for a long time.

Some women who love beauty believe that drinking coffee on an empty stomach in the morning can eliminate defecation and detoxification, and also have the effect of losing weight. Is that really the case? Li Yanling, director of the Nutrition Department of the first affiliated Hospital of Tianjin University of traditional Chinese Medicine, told the media that drinking coffee on an empty stomach can stimulate the intestines and stomach and remove stools to a certain extent, but long-term drinking can easily lead to diseases such as gastric ulcers.

Li Yanling said that the reason why drinking coffee on an empty stomach has the effect of losing weight is that after a night's rest, when drinking coffee on an empty stomach in the morning, the exciting ingredients in the coffee will stimulate the stomach and intestines, which in turn affect the normal absorption of nutrients for breakfast and eventually lead to weight loss. But this weight loss method is more extreme, long-term fasting coffee, even if the gastrointestinal mucosal function of people, over time is also easy to lead to gastric ulcers, gastritis and other adverse symptoms.

Drinking coffee at breakfast has the worst refreshing effect.

Stephen Miller, a neuroscientist at the University of Health Sciences Unified Service in Maryland, found in 2013 that drinking coffee when cortisol levels peaked between 8am and 9am was not the best pick-me-up and produced tolerance to caffeine.

Cortisol is an important hormone that can help the body regulate the biological clock and improve alertness. Cortisol levels rise and fall in the body and begin to rise after getting up in the morning and begin to fall back about an hour later. Miller's study found that people's cortisol levels peaked between 8am and 9am on average.

Miller believes that drinking coffee after this peak is better because the caffeine in coffee promotes the production of the hormone when cortisol levels drop. It's wasteful to drink coffee when cortisol levels are high, and it's easy to tolerate caffeine, which means you need an extra cup to achieve the same pick-me-up effect. One of the main principles of pharmacology is to take medicine only when needed, otherwise drug tolerance may occur. "in other words, the effect of drinking the same cup of coffee in the morning may be poor."

Some nutritionists say that drinking coffee at breakfast will make the heart beat faster and cause the stomach to contract. The sugar consumed in breakfast is quickly absorbed by the body, causing a strong sense of hunger. At this time, people will become irritable, absent-minded and don't want to do anything but eat.

Best time: 9:30-11:30

According to Stephen Miller's calculations, the best time to drink coffee every day is between 9:30 and 11:30 During this period, the interaction between caffeine and cortisol reached the optimal state. He also points out that cortisol levels peak again between 12:00-1pm and 5:30-6:30, meaning that drinking coffee during these periods also reduces the pick-me-up effect.

In addition, the content of cortisol in the human body will also be related to people's physique and schedule. Early risers' cortisol levels peak earlier than those who like to sleep in, so the best time to drink coffee is earlier, and those who get up late should drink coffee later.

Drink less coffee after dinner

There are also different opinions about the best time to drink coffee. Some researchers believe that drinking coffee in the afternoon is the best, helping to counteract the lack of concentration caused by lunch. But whether drinking coffee in the morning or drinking coffee after lunch, it avoids the irritation to the stomach caused by drinking coffee on an empty stomach, and can also promote gastrointestinal peristalsis, help digestion, and decompose high-calorie and high-fat foods.

It is best not to drink coffee after dinner to avoid affecting sleep. If you want to stay up all night by drinking coffee, you may drink too much without knowing it, which is bad for your health.