How does sugar give you a burst of energy? Sugar is broken down by the body into glucose, which then travels through your blood to your muscles and organs where it’s converted into energy. The American Heart Association, however, recommends keeping sugar intake to just 36 grams (nine teaspoons) a day for men, or just 25 grams (six teaspoons) a day for women.
The US Food and Drug Administration (FDA) recommends consuming no more than 50 grams of added sugar a day, based on a 2,000 calorie daily diet. It all depends on the brand, but one can of energy drink can contain around 54 grams of sugar, or about 13 teaspoons of sugar. One thing that sets energy drinks apart from other caffeinated beverages is the sugar content, and you may see this on the label as high-fructose corn syrup or sucrose. To compare that to coffee, a single shot of espresso has about 63 mg of caffeine, whereas a cup of instant coffee ranges from 30 to 90 mg. Many energy drinks contain 50 to 160 milligrams of caffeine, but some can even contain more than 500 mg of caffeine. Caffeine comes in and binds to adenosine receptors in your brain, so the chemical can’t work on you, and you don’t feel its sleepiness effects. It acts as a neurotransmitter, depressing the central nervous system, and eventually reaching levels that make you feel drowsy. Adenosine is a chemical that builds up naturally in your body all the time you’re awake. We all know and love caffeine, and it works by temporarily stopping us from feeling sleepy. Energy drinks are made up of a few ingredients designed to make you feel more awake and alert.
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