nergy drinks are beverages that claim to boost physical stamina and mental alertness through their caffeine and stimulant content.They feature caffeine levels significantly higher than coffee,ranging from 70 to 500 mg per can or bottle.In addition to caffeine,energy drinks often contain sugar,B vitamins and herbal extracts like taurine,guarana and ginseng that are marketed as energy boosters.Upon consumption,the caffeine in energy drinks elevates heart rate,blood pressure and respiration while reducing feelings of fatigue.Though popular for providing a quick energy boost,research links excessive and regular energy drink use to health issues like abnormal heart rhythms,high blood pressure,anxiety and insomnia.

英語での「energy drink」の定義と意味

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