Because Monster Energy drinks contain caffeine, they're marketed as a beverage that will boost your energy and keep you alert and awake for several hours after drinking one. The beverage provides you with caffeine, which might give you a burst of energy, and supplies certain key nutrients. But that doesn't mean that the beverage is good for you.
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Calories and Sugar
One regular Monster energy drink contains 101 calories and 27 grams of added sugar per 8 ounces. That 27 grams of sugar is equal to almost 7 teaspoons of the sweet stuff. The American Heart Association recommends that women consume no more than 6 teaspoons of sugar per day and that men limit themselves to 9 teaspoons. Regularly having more sugar than this puts you at an increased risk for weight gain, and being overweight raises your chances of developing heart disease and Type 2 diabetes.
A Monster energy drink contains several B vitamins, which are responsible for turning your food into energy. A serving of Monster energy drink contains about 20 milligrams of niacin, which is more than you need for the entire day. You'll also get 1.7 milligrams of riboflavin, which is also more than you need for the day. A Monster energy drink also supplies more vitamin B-6 and B-12 than you need for the entire day.
Sweet but Salty?
A Monster energy drink might taste sweet, but one serving also contains 180 milligrams of sodium. The American Heart Association recommends that healthy adults limit their sodium intake to 1,500 milligrams per day, so that Monster drink is 12 percent of that limit. Having too much sodium in your daily diet can lead to high blood pressure, which raises your risk of heart attack and stroke, according to the American Heart Association.
The occasional Monster energy drink isn't a huge concern, but one serving contains 86 milligrams of caffeine, which is about one-third of the recommended moderate daily 250-milligram limit, notes the University of Maryland Medical Center. Too much caffeine can cause trouble sleeping, jitteriness, anxiety, restlessness, nausea, tremors and an increase in urination. A low-carb Monster drink is a lower-sugar alternative, though it still contains 72 milligrams of caffeine. A low-carb Monster drink contains 12 calories and 3.3 grams of sugar, making it a better option if you want to have a Monster energy drink more often than occasionally.