One teaspoon of pure caffeine powder delivers about the same jolt as 25 cups of coffee.
The Center for Science in the Public Interest
December 31, 2014 With two young men dead, the Food and Drug Administration is considering banning sales to consumers of a highly concentrated form of pure caffeine. It's too easy to overdose, officials warn.
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September 30, 2014 Here's a government service: The Federal Trade Commission has told two companies to quit selling caffeinated women's undergarments because they don't actually slim your nether regions as advertised.
Peter Kennaugh of SKY Procycling enjoys an espresso ahead of first stage of the Tour de France 2013, in Corsica.
Scott Mitchell/teamsky.com via Getty Images
August 1, 2014 Studies show the caffeine in just a few cups of coffee enhances performance in a wide range of sports. But more isn't better, and concentrated caffeine can be lethal.
June 2, 2014 For this week's Sandwich Monday, we try Perky Jerky. It's dried meat loaded with caffeine to fuel everything from athletic pursuits to midmorning breaks in the office.
According to the pediatrics study, about three-fourths of children in the U.S. consume caffeine on a given day.
February 11, 2014 Energy drinks tend to get a bad rap. But when it comes to caffeine intake, teenagers seem to be getting far more caffeine from coffee drinks. Overall, about three-fourths of children in the U.S. consume caffeine on a given day.
A barista makes coffee using the pour-over method at Artifact Coffee in Baltimore.
January 13, 2014 A new study adds to the evidence that among everyday coffee drinkers, the old wives' tale that coffee will lead to dehydration is really just that: a tale. Another study found that caffeine may help to consolidate memories in the short term, but may not help retrieve old memories.
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Wrigley took its new Alert Energy Caffeine Gum off the market after it prompted FDA scrutiny of caffeinated foods.
May 9, 2013 No caffeinated chew for you! The Wrigley Company pulled its Alert Energy caffeinated gum off the market after the product roused concern from the Food and Drug Administration.
Wrigley says its new Alert Energy Caffeine Gum gives consumers the power to control how much caffeine they get.
April 30, 2013 Wrigley's new caffeinated gum has raised eyebrows at the FDA, which is worried about the potential health impacts on children and teens.
Many believe that humanity's caffeine addiction has wrought a lot of good.
April 26, 2013 Historians tell us that caffeine in coffee helped Western civilization "sober up" and get down to business. Now scientific research shows that at low doses, caffeine improves performance on mental tasks, especially in people who are already tired.
Some baristas swear that bananas can cure your coffee jitters, but the science just doesn't add up.
Daniel M.N. Turner/NPR
March 13, 2013 Can eating a banana counter the effects of being over-caffeinated? That's a claim that's been circulating around blogs recently. Some baristas swear by it, but we talked to a scientist who explains why it just isn't true.
March 7, 2013 Feeding on flowers with caffeinated nectars gives bees a memory boost, new research shows. Turns out, other studies have found humans can get a similar boost in short-term memory with caffeine — if they're exhausted.
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The bar at a surprise birthday party for Teen Wolf's Stephen Lunsford, presented by Monster Energy last November in Los Angeles.
January 22, 2013 A new report says the number of ER visits involving caffeine-laced energy drinks doubled from 2007 to 2011. Many of those visits involved patients who combined the drinks with alcohol and other drugs, intensifying the effects. Manufacturers say there's no proof the drinks are to blame.
There might be much more caffeine than you think in those supplements you're taking. There also might be much less.
January 9, 2013 A chemical analysis funded by the Defense Department finds that some dietary supplements contain far more caffeine than the amount listed on their labels. Other energy-boosting supplements contain less caffeine than the labels claim.
The contents of a box of some of the new foods containing caffeine collected by the Center for Science in the Public Interest.
Karen Castillo Farfán/NPR
December 17, 2012 Are we getting "Jack'd"? A surge in new caffeine-containing foods leads to new questions about just how much caffeine we're getting in our daily lives. Some advocates are calling for labeling, and they raise concerns about children's and teens' consumption.
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Sarah Piampiano holds two energy gels, one with caffeine and one without, as she runs in this year's Ironman World Championship.
Murray Carpenter for NPR
November 19, 2012 Endurance athletes often turn to the same stimulant that gives your morning cup of joe its jolt: caffeine. They're increasingly using caffeinated gels and drinks when they compete. But how much is too much?
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