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AICR HealthTalk

Karen Collins, MS, RD, CDN
American Institute for Cancer Research

Q:        What’s the difference between sports drinks and energy drinks?  My teenager drinks a lot of both, and he says he needs them because of sports.           

A:        Sports drinks may have a place for teen athletes, but not energy drinks. Many teens may take energy drinks to give them an “edge” in sports, but the American Academy of Pediatrics warns that safe consumption levels of energy drinks have not been established for adolescents. Sports drinks provide fluid along with substances called electrolytes (sodium, potassium, magnesium) that are lost in sweat. They provide carbohydrate in an amount and form that can help athletes who exercise intensely more than an hour, or in very intense short bursts (as in hockey). Sports drinks contain about two-thirds the calories of regular soft drinks. Energy drinks are completely different. They are a source of caffeine and other stimulants, and often sugar. Studies show that 100 to 200 milligrams (mg) of caffeine (about 1 to 2 cups of regular coffee) increase energy and alertness. Many 16-ounce cans of energy drinks provide caffeine in this range. But extra large portion sizes and additional stimulant ingredients may bring caffeine as high as 500 mg per can or bottle; and some energy drink users consume more than one can. Although relatively small amounts of caffeine taken shortly before sports or exercise can enhance and prolong ability to exercise, using caffeine to raise energy can end up worsening energy problems in the long run. When people consume more than 250 mg caffeine per day, they may experience headache, sleep difficulties or increased anxiety. Beyond 1000 mg they may have heart palpitations. Deaths from seizures or cardiac arrest are rare, but have been reported. Caffeine stays around longer than people realize, impairing nighttime sleep that leads to daytime sleepiness and low energy. It takes three to ten hours to clear even half a caffeine load from the body, and 15 to 35 hours to eliminate virtually all of it. And you can get a lot of sugar from the 15- to 24-ounce containers. Sugar-free versions are available, but energy drinks typically contain 200 to 300 calories, with over a quarter cup of sugar per 16-ounce can.


The American Institute for Cancer Research (AICR) is the cancer charity that fosters research on the relationship of nutrition, physical activity and weight management to cancer risk, interprets the scientific literature and educates the public about the results. It has contributed more than $95 million for innovative research conducted at universities, hospitals and research centers across the country. AICR has published two landmark reports that interpret the accumulated research in the field, and is committed to a process of continuous review. AICR also provides a wide range of educational programs to help millions of Americans learn to make dietary changes for lower cancer risk. Its award-winning New American Plate program is presented in brochures, seminars and on its website, www.aicr.org. AICR is part of the global network of charities that are dedicated to the prevention of cancer. The WCRF global network is led and unified by WCRF International, a membership association which operates as the umbrella organization for the network.The other charities in the WCRF network are World Cancer Research Fund in the UK (www.wcrf-uk.org); Wereld Kanker Onderzoek Fonds in the Netherlands (www.wcrf-nl.org); World Cancer Research Fund Hong Kong (www.wcrf-hk.org).

Published on 02/18/2013

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