Are you sure you don’t want to take a look at these little secrets of caffeine?

Caffeine is a xanthine alkaloid compound and a central nervous system stimulant that can temporarily drive away sleepiness and restore energy. Coffee, tea, soft drinks and energy drinks with caffeine are very popular, so caffeine is also the most commonly used psychoactive drug in the world.

In North America, 90% of adults consume caffeine daily. Many natural sources of caffeine also contain a variety of other xanthine alkaloids, including the cardiotonic agents theophylline and theobromine, as well as other substances such as tannic acid.

Everyone knows this professional knowledge. Next, I will tell you something that you may not know.

1. Caffeine has a positive effect on improving short-term and long-term memory.

In the past, a large number of studies have shown that caffeine has a positive effect on short-term memory, and recent studies have also shown that caffeine has a positive effect on long-term memory. As long as you take a certain amount of caffeine every day according to your body, you can prevent cognitive decline and Alzheimer's syndrome.

2. Caffeine can improve athletic performance.

Consuming moderate amounts of caffeine about an hour before a workout or competition can improve your athletic performance. “Statistics show that caffeine has a significant effect on increasing alertness and improving reaction time.

3. The effect of caffeine on the human body is almost immediate.

Caffeine easily crosses the blood-brain barrier, so the central nervous system is stimulated quickly, meaning you feel more alert immediately after consuming caffeine and continue to feel the effects until the effects reach their peak.

4. The caffeine content in different coffees is different.

A 16-ounce cup of coffee from Starbucks has 100 milligrams more caffeine than the same cup from Dunkin' Donuts, according to a study published in the journal Analytical Toxicology. The study also found that even the same drink from the same chain can vary by as much as 300 milligrams from day to day.

A standard cup of coffee contains between 90 and 225 milligrams of caffeine, London said.

5. The caffeine content of a cup of espresso coffee is much lower than that of other coffees.

Many people think that espresso has a high caffeine content. London said that a cup of espresso contains 40 to 70 mg of caffeine, which is much lower than the caffeine content of a regular cup of coffee. Since the caffeine content of drip coffee is much higher, if you are sensitive to caffeine, you should order coffee drinks based on espresso, such as cappuccino.

6. Caffeine won't dehydrate you.

Since 98 percent of caffeine is consumed in beverages, according to the FDA, you're also hydrating when you consume caffeine.

So, even though caffeine is a diuretic, it won't dehydrate you. However, this doesn't mean you should only drink caffeinated drinks; enjoy coffee drinks in moderation and don't forget that water is still the best drink for hydration.

7. The sources of caffeine are not just various drinks.

Chocolate is also one of the main sources of caffeine, and caffeine can be added to almost all foods or substitutes, which is why you can always find caffeine in some medicines such as Midol.

So if you have heart disease or high blood pressure, be sure to consult your doctor before taking any pain reliever containing caffeine.

8. Caffeine is harmful to the human body.

1. Caffeine poisoning

If you take too much caffeine at one time, you are likely to experience symptoms such as "caffeine poisoning". It can be said that a large dose of caffeine is a drug. Once caffeine poisoning occurs, the patient will experience various discomfort symptoms, such as nervousness, irritability, anxiety, tremors, etc.

2. Overexcitement

Everyone knows that coffee has the effect of refreshing the mind. This is because coffee contains a large amount of caffeine, which can stimulate the central nervous system to achieve the effect of refreshing the mind.