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See if you can ID me.
你是否能把我鑒別出來。
I`m an organic compound that`s found in several of the foods we ate. I`m naturally bitter in flavor and well known for stimulating the central nervous system.
我是一種有機物，存在于日常吃的一些食物中。我天生有點苦，并且因能刺激中樞神經系統而眾所周知。
I`m caffeine, a substance with several benefits and drawbacks.
我是咖啡因，一種既有優點又有缺點的物質。
A couple of things you might not know about caffeine. One, people can get physically dependent on it.
關于咖啡因，有一些事情你可能不知道。第一，人們在身體上可能會依賴它。
It`s not considered as addictive as say illegal street drugs or alcohol, but people who are used to caffeine and suddenly stop drinking it can get headaches. They can become anxious or depress.
雖然這并不是非法的街頭毒品或酒精，但那些習慣咖啡因的人會因為停止喝它而頭痛。他們會變得焦慮或沮喪。
They can have a hard time concentrating.
他們很難集中精力。
Another thing about caffeine is that the U.S. Food and Drug Administration has a new warning out about it.
另一個關于咖啡因的事情是，美國食品和藥品管理局對它發出了新的警告。
The alert focuses on pure powdered caffeine, something so potent that small amounts can cause an accidental overdose.
警告集中在純粉末狀的咖啡因，它們非常有效以至于少量都可能會導致意外過量。
The FDA says it`s aware of at least two people who have died from taking it.
美國食品和藥物管理局表示，至少有2人因服用它而死亡。
Caffeine is everywhere -- in coffee, iced tea, sodas, even in some medications. It`s an stimulant that can make you feel more alert and give you that boost of energy.
咖啡因無處不在——咖啡，冰茶，蘇打水，甚至在一些藥物中都存在。這是一種刺激性物質，能使你更加警覺并提升能量。
It increases blood flow to the muscles, opens up your lungs. It gives increased performance.
它能增加肌肉中的血液流動，擴大肺活量，增強機體性能。
But when you consume too much of it, caffeine can cause major health problems. On average, most people can handle about 300 to 400 milligrams of caffeine per day. That`s about what`s in three to four six ounce cups of coffee.
但當你攝入過多的咖啡因就會導致健康問題。平均而言，大多數人每天可以攝入大約300到400毫克的咖啡因。也就是三至四盎司杯的咖啡。
What`s concerning these days is more and more products contain larger amounts of caffeine. Energy drinks, supplements, even powdered caffeine contains way more of the substance than any cup of coffee. For example, the FDA warns one teaspoon of powdered caffeine is equivalent to 25 cups of coffee.
如今越來越多的產品含有大量的咖啡因。功能飲料，營養品，甚至一些物質中含有高于任何一杯咖啡中的咖啡因。例如，美國食品藥品管理局警告，一茶匙的粉末咖啡因相當于25杯咖啡。
When they take what they think is a dose, it`s 10, 15, 20 times what they`re expected.
他們認為是可以接受的劑量，其實是預期的10，15，20倍。
Consuming more than 1,000 milligrams of caffeine can lead to some serious side effects like an irregular heartbeat, nausea, tremors,insomnia, and in some rare situations, death.
攝取超過1000毫克的咖啡因會導致一些嚴重的副作用，例如不規則的心跳，惡心，震顫，失眠，在某些罕見的情況下甚至造成死亡。
So, beware of what you`re drinking. Best way to avoid caffeine overdose is to check the ingredients just to see how much caffeine you`re taking in.
所以，留意你喝的東西。避免攝入過量咖啡因的方法就是查看食品成分，看看你到底攝入了多少咖啡因。
譯文屬可可原創，僅供學習交流使用，未經許可請勿轉載。
