Want to sleep after drinking coffee? Why does drinking coffee refresh you? How many cups of coffee are best a day?

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A cup of coffee is standard for many office workers every day. I can't get inspiration. Drink it! Be fucked by the boss to be powerless, drink! The proposal is written until the middle of the night. Drink! To many people, coffee is like Baolida B of the labour sector. if you have nothing to drink, it is like wearing a golden bell cover, and sleepy worms cannot invade it.

But have you ever wondered how coffee works in your body?

Unveil the "coffee pick-me-up" from a chemical point of view

When the body releases adenosine, it makes people want to sleep. The chemical structure of caffeine and adenosine is like twins, so when caffeine enters the body, it gets stuck in the body. when the card is full, even if the body releases adenosine, adenosine is homeless, so we feel energetic!

By the same token, if you are exhausted and then drink coffee, of course, it will not work, because adenosine is already in a good position. First-come-first-served politeness works the same way in the body! So remember to pour a cup of coffee before you feel tired and let caffeine grab the seat first!

You have to drink several cups of coffee a day so that you don't drink too much coffee.

Coffee enhances people's combat strength, and it is very difficult for anyone to resist the aroma of coffee, so it is easy to make people drink coffee one cup after another. But everything goes too far.

According to the ILSI Taiwan report, China's current recommendations for caffeine intake should not exceed 300mg per day. Let me convert it here. 300 mg of caffeine is equivalent to about 3 cups of freshly brewed coffee, 7.5 cans of carbonated drinks, or 1.5 cans of energy drinks.

However, as the amount of caffeine drinks sold in the market has not yet been standardized, the above conversion materials are for reference only. Your body takes care of itself, and you still have to calculate the caffeine intake when you drink coffee.

The same show: the good and bad of coffee

Nothing is completely good, coffee is refreshing, but it is not suitable for everyone! Here is to help you sort out the good coffee and the bad coffee too much:

[coffee drinkers are great]

1. Coffee energizes you.

two。 Help burn fat: according to Health Journal, caffeine increases metabolic rates by 3% to 11%. Drinking coffee for overweight people increases fat burning by 10%, while it can be as high as 29% in thinner people. But note that for people who drink coffee for a long time, the effect may be worse.

3. Prevention of Alzheimer's disease and senile dementia: drinking coffee can also reduce the risk of developing Alzheimer's disease by 65%, according to the Daily Mail (Daily Mail).

[the quality of coffee / coffee]

1. Reduce calcium and magnesium absorption: according to Wang Jinyi, president of the International Society of Health and Nutrition, consuming too much caffeine can easily hinder the absorption of calcium and magnesium.

two。 Osteoporosis: from a physiological point of view, caffeine increases calcium loss. More than half of the epidemiological data show that caffeine intake is related to bone mineral density in women over 50 years old.