Why Coffee has the refreshing effect of Coffee

When it comes to coffee, the first chemical that comes to mind is caffeine. Briefly, caffeine is a xanthine alkaloid compound naturally present in coffee beans

It is a mild central nervous stimulant that can temporarily help drinkers drive away drowsiness and restore spirit. Coffee is considered a psychoactive drug and is widely popular.

It's the "caffeine" part. In general, caffeine's effects on the human body include: stimulation of the central nervous system, acute elevation of blood pressure, increased metabolic rate, and thus

It improves sensitivity, concentration, mental state and physical fitness.

Although the caffeine content varies from type to type, the average cup contains about 100 mg of caffeine.[ 2 ] What kind of effect does this dose have on the human body?

What about it? In Coffee and Health: Recent Human Studies, the authors note that, retrospectively, adults are assumed to drink three to four cups of coffee a day (about 300 g/d).

~ 400 mg/day),"there is evidence that it is less risky and beneficial to health"[ 1 ]. According to pharmacological studies, caffeine is easily absorbed by the human body, and 30 minutes after drinking, it is in the blood.

The concentration peaks, and then it's metabolized out of the body faster. However, it is undeniable that excessive caffeine can easily lead to tinnitus, shortness of breath, myocardial hyperactivity (rapid heartbeat) and pulse failure.

All; long-term drinking is also addictive, once stopped intake will appear listlessness, physical fatigue and other symptoms. In addition, hypertensive patients, children, and the elderly are more susceptible to its adverse effects.

Pregnant women who consume more than 300 mg of caffeine a day may cause spontaneous abortion or impaired fetal growth.

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