Explain a little more, usually adnosine is something that is produced by the body's energy. joker Which has accumulated in the brain, we will be sleepy. Sleep will help eliminate adenosine well, so we will lose sleepiness by drinking coffee. It only blocks the action of adenosine in the brain when adenosine has not bind to the receptors in the brain. You have to eat before you get sleepy. If you're sleepy, drinking coffee might not help much. You have to wait for the brain to clear the old adenosine first. so you will feel refreshed

In some people, drinking coffee late in the morning or after noon can worsen sleep quality. Symptoms like not sleeping enough because it awakens the brain even though it is asleep.
Is to make the deep sleep shorter, so even some people say that they drink coffee. and sleep But that sleep may not be effective. I wake up so I'm not really fresh. Consuming too much caffeine (over 8 cups) can stimulate the nervous system so much that it causes anxiety. Or people with bipolar may have a relapse. Coffee withdrawal symptoms may be found in people who drink coffee regularly and stop. Symptoms are drowsiness, headache, fatigue, which is very much in the first 1-2 days and then gradually decreases until disappears. go by yourself

2. The effect of coffee on the cardiovascular system
Drinking coffee may temporarily raise blood pressure but does not cause high blood pressure. Some substances in coffee brewed without a filter (French press, Turkish) raise your LDL cholesterol slightly, about 17 mg dl. is the heart beating faster Sometimes there may be a slight increase in the arrhythmia. that we feel like our hearts are stumbled But if it's a dangerous arrhythmia, such as atrial fibrillation or a palpable arrhythmia, drinking up to 6 cups of coffee does not increase your risk.
There is also information that People who drank 3-5 cups of coffee had a lower risk of developing ischemic heart disease.

3. The effect of coffee on body weight
Drinking coffee increases the basal metabolic rate (BMR) or burns the body's basic energy. Therefore, it may help to control weight better. (must not put syrup whipped cream)
4. Effects on carcinogenesis
Drinking "no" coffee increases the risk of cancer and there is quite strong evidence that it reduces the risk of cancer. Endometrial cancer and liver cancer

5. Effects on the gallbladder
Drinking coffee reduces the incidence of gallbladder stones and gallbladder cancer (but decaf. coffee doesn't help).

6. Effects on neurological diseases
Drinking coffee reduces the risk of Parkinson's disease (decaf coffee does not help), reduces depression. But don't drink too much (>8 cups a day), but coffee does not reduce the incidence of dementia. and Alzheimer's

7. Effect on life expectancy
A study of people of all races found that drinking two to five cups of coffee a day reduced mortality. Regular coffee or decaf. has the same effect.

8. Effects in Pregnant Women
Excessive coffee consumption can lead to a miscarriage of a newborn baby or a mother.