1 Coffee refreshment effect varies greatly? It’s all in the genes
Caffeine has a central nervous system excitatory effect, but this effect varies greatly in different people.
The human body has some genes such as CYP1A2, PDSS2, etc., which encode enzymes that can affect the metabolism of caffeine.
These enzymes are more active people, the metabolism of caffeine is faster, the intake of caffeine will soon be cleared out of the body, so drink coffee the sleepy or sleepy.
But some people’s coffee metabolism gene is more sluggish, a little caffeine are metabolized for a long time. Even the coffee you drink in the morning is still bouncing around in your brain at night.
In addition, different people’s brains, some receptors for caffeine action (such as ADORA2) also have some subtle differences because of the diversity of gene sequences, which can also affect the effect of caffeine.
But it is also possible that the timing of drinking is not quite right. Drinking coffee before getting sleepy is the most effective way to boost your energy.
2 coffee may make the heart beat faster, this is normal
After drinking coffee, some people will experience a rapid heartbeat, nausea, dizziness and other discomfort, commonly known as “caffeine intolerance “.
In fact, this is a normal phenomenon, again related to the individual’s sensitivity to caffeine. This part of the population may be more sensitive to caffeine, caffeine metabolism is a little slower.
However, this does not mean that you can not drink coffee, but to adjust the frequency and portion of coffee according to your own situation.
For example, if you drink 2 cups a day, you may want to reduce it to 1 cup a day, so that your body and caffeine well ground.
3 Drinking coffee does not lead to heart disease
Some people will palpitate after drinking coffee and worry that drinking coffee will lead to heart disease.
The American Heart Association, the European Society of Cardiology and other authoritative institutions after research that moderate consumption of coffee (about 1 to 2 cups a day) will not increase the risk of heart disease and cardiovascular disease.
Moreover, people with cardiovascular disease can drink coffee.
Studies have shown that for those who already suffer from coronary heart disease, or even have had a myocardial infarction, drinking coffee will not affect their heart function, nor will it aggravate the symptoms, or even have a protective effect.
4 drink coffee, may run the toilet frequently
Many people have had the experience of frequent urination after drinking coffee.
In fact, caffeine is a natural diuretic. If you want to refresh yourself by drinking coffee before the exam, remember to drink less water ……
There are also some people who want to poop or even have diarrhea after a while after drinking coffee.
It is true that a small sample study said that about 29% of people who drink coffee will have a laxative effect. But it is not clear whether this is the effect of caffeine or not. Because there are also studies that found that decaffeinated coffee has a similar effect.
If you start to have a bowel movement every time you drink coffee, and the process is incredibly smooth, maybe you are that 29%!
5 Pregnancy is best not to drink, you can drink in moderation during menstruation
Although Health Canada, the American College of Obstetrics and Gynecology, the American Pregnancy and Childbirth Association and other organizations believe that coffee can be drunk in moderation during pregnancy, and recommend a daily intake of caffeine of no more than 150-300 mg, which is about 2 standard cups (235 ml) of the amount.
However, in recent years, there has been updated evidence that coffee consumption during pregnancy may be associated with an increased risk of spontaneous abortion. Therefore, we still do not encourage coffee drinking during pregnancy, and it is better to tolerate it for the sake of the baby.
There are also concerns that drinking coffee during menstruation can cause menstrual cramps and other uncomfortable symptoms, but there is no conclusive evidence.
One study tracked data from 2,426 nurses over 12 years and found that caffeine intake was not directly related to menstrual syndrome.
For individuals, if there are no adverse reactions after drinking coffee during menstruation, then it is okay to drink.
6 Drinking coffee, not found to be associated with stomach ulcers
In 2013, a study surveyed 8,013 healthy people, and the final result was that the occurrence of gastric ulcers or duodenal ulcers had little to do with whether or not to drink coffee.
Normal people don’t have any problems even if they drink coffee on an empty stomach.
However, coffee does have some effects on the gastrointestinal tract, such as increasing the secretion of stomach acid, relaxing the esophageal sphincter, and promoting small intestinal peristalsis.
People who already have gastrointestinal dysfunction may experience discomfort after drinking coffee, and it is recommended to adjust the amount of coffee consumed according to your situation.
7 Normal coffee drinking will not lead to osteoporosis
It is true that there are studies that say that the caffeine and oxalic acid in coffee and other components will affect calcium absorption and increase calcium loss. But each cup of coffee makes people lose very little calcium.
Also, there is no need to worry about coffee causing osteoporosis. The International Osteoporosis Association and the National Osteoporosis Society recommend that a daily coffee intake of 3 cups (100 mg of caffeine per cup) or less is acceptable.
If you are really worried, drink coffee with a little more milk.
8 Coffee is not carcinogenic and can reduce the risk of certain cancers
“Coffee causes cancer ” is a widely circulated rumor. But this worry is completely superfluous.
In 2016, the World Health Organization (WHO) made it clear that coffee is not a cancer-causing hazard.
In 2017, the International Agency for Research on Cancer (IARC) released a report also stating that there is no evidence that drinking coffee causes cancer.
Moreover, there are many other studies that show that coffee can reduce the risk of liver cancer, breast cancer, endometrial cancer and other cancers.
However, do not drink too hot. 65 ℃ or more hot drinks, there is a real risk of cancer.
9 often drink coffee will produce dependence, but do not have to quit
Regular intake of caffeine, the body may produce a mild dependence.
If you suddenly do not drink, you may have headaches, fatigue, anxiety and inability to focus and other symptoms.
However, these symptoms will disappear on their own in a few days, and there will be no serious withdrawal symptoms or lasting physical and mental effects like other psychotropic drugs or substances.
If there is no specific reason, there is no need to deliberately quit coffee.
10 Coffee is healthy, provided you don’t add sugar and cream
It should be reminded that not all coffee is healthy, and the coffee in this article refers to black coffee without adding anything.
Now many instant coffee or fancy coffee on the market, have added a lot of white sugar, phyllo, such coffee can not be healthy.
In addition, those topped with a pile of cream, but also sweet and sweet “caffeinated drinks The “caffeinated drinks” (including milk tea), not only calorie explosion, but also because of the high sugar produce a variety of bad effects, drink less is better.
If you feel that black coffee is too bitter, you can add some milk or milk powder.
Drinking coffee was once considered an unhealthy habit similar to smoking and drinking alcohol for a long time.
But now it seems that coffee has endured too many misconceptions over the years
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