"People report increased well-being, better mood," Juliano says. Studies show that 100 milligrams - just a 6-ounce cup of a typical automatic-drip coffee - produces a lift. And as one ages, there are just changes in our metabolism."Īs a general rule of thumb, most caffeine users need a surprisingly small amount of the stimulant to enjoy its pleasant effects.
We require liver enzymes to break down caffeine. "People become more sensitve to caffeine as they get older. Smokers can often tolerate more caffeine because nicotine is thought to stimulate the enzymes that break caffeine down. Also, eating a meal just before consuming caffeine can slow down the stimulant's effect. Researchers believe part of the equation is genetic makeup, part is body weight. Sensitivity to caffeine varies widely from one person to the next. "There's research to show that people who have caffeine in the morning can take longer to fall asleep that evening." "Even having it now may have an effect on my being able to fall asleep tonight," she says. During a late-morning break at a campus cafe, she ordered decaf. She drinks a little bit of caffeine from coffee first thing in the morning. Juliano is trying to figure out exactly how much she can tolerate. But it can also make us anxious and interfere with sleep. Caffeine can help put us in a good mood in the morning or help us focus on a task at hand. "Caffeine is a drug that can affect our central nervous system and affect some pretty important areas of our lives," says American University caffeine researcher Laura Juliano.Īnd it's a drug with pros and cons. With this description, it sounds as if Warwinsky is referring to a drug habit. "And if I manage it well and drink it two or three times a day, half and half, I'm not too crazed." "It sort of gives me a lift," says long-long-longtime coffee drinker Rich Warwinsky. It's part ritual, part pick-me-up, part habit. People who love coffee consider it more than just a drink. You can actually drink three shots of Starbucks espresso and get about the same 195-milligram dose as a 12-ounce coffee. Coffee: Despite its eye-opening reputation, espresso actually contains less caffeine than brewed coffee, due to its deep roast and quick brewing. So a long steep in a French press yields more juice than a drip maker.Įspresso vs. If you're buying your own grinder, a "burr" grinder yields more caffeine, while a "blade" grinder leads to a more laid-back cup.īrewing: In general, the longer you brew, the more caffeine you get out of the beans. This allows more caffeine to seep out of the bean and into your brew. Grind: Rougher grinds create more tiny surfaces on each grain of coffee. Roasting burns off some of the caffeine, so opt for a dark French or Italian roast for a less jolting cup. Roast: Darker roasts actually have less caffeine than light roasts, even though the flavor is stronger.
Plant growing conditions, such as soil moisture, also affect caffeine content, but that's out of your hands. It's not a point of pride if your coffee is made with robusto, but it will give you a bigger buzz, ounce for ounce. How do you know which you're drinking? Some companies, like Starbucks, advertise that they use only the more expensive and flavorful arabica. Type of Bean: Of the two commonly used coffee plant varieties, arabica beans have half the caffeine of robusto beans. Studies suggest just 100 milligrams of caffeine (the amount in a six-ounce cup) are needed for the average person to get a lift - so watch out for buzz overload. That amount of coffee could deliver as much as 400 milligrams of caffeine. Serving Size: The industry standard for a cup is six ounces, but most people super-size their coffee to at least 16 ounces (that's a "grande" at Starbucks).
#Amount of caffeine in a cup of coffee how to#
Here, tips on how to make sure your java jumps, from Joseph DeRupo of the National Coffee Association: It depends on everything from the roast and grind to your barista's technique – and the rain in Kenya. Caffeine content varies from brew to brew, so it's hard to know how much you're getting.
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