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  • noun

Synonyms for caffeine

a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects


References in periodicals archive ?
On average, those given the real caffeine pill were 3.3 percent faster on the bike than those who didn't; they were only 2.2 percent faster when they took the placebo.
On day three, participants were asked to take a 200 mg caffeine pill (Equate[R]-Stay Awake) with 200 mg of water.
Those who took the caffeine pill under low-light conditions were found to have a roughly 40-minute delay in their nightly circadian rhythm compared to those who took the placebo pill under low light conditions, said Wright.
One recent study, though, found that taking a caffeine pill after a learning task actually improved memory recall up to 24 hours later.
In a small trial, 61 Parkinson's patients who complained of daytime sleepiness and motor symptoms were either given a placebo or a 100-mg caffeine pill twice a day for three weeks.
The experiment was then repeated once they'd taken a caffeine pill.
However, as Tom is about to discover, there's a very good reason Mac has been behaving so erratically - Marnie and James have swapped his sleeping tablets for caffeine pills, which would make anyone edgy.
However, as Tom is about to discover, there's a reason Mac has been behaving erratically - Marnie and James swapped his sleeping tablets for caffeine pills.
Most caffeine pills contain 100-200 mg each, and while caffeine content in energy drinks and "shots" varies, some approach or slightly exceed 400 mg.
ATHENS, Ga., , Rabi'I 18, 1437, December 29, 2015, SPA -- Caffeine from coffee may be just as beneficial for athletes' endurance as caffeine pills, researchers found in a review of studies, according to UPI.
"There's the potential that getting your caffeine by drinking coffee has similar endurance benefits as taking caffeine pills."
He advises against caffeine pills, reminding users that “there's plenty of caffeine in coffee or tea, and you get beneficial polyphenol compounds via nature's natural delivery systems.”
The study, which involved 160 people between the ages of 18 and 30, showed that giving a dose of 200 mg caffeine pills (roughly equivalent to two mugs of instant coffee) enhanced their ability to distinguish between subtly different objects one day after studying them.
The more hardcore among us will use energy drinks or pop caffeine pills.
Moreover, the only study that examined the effect of caffeine on DOMS used caffeine pills, while the present research will use the caffeine in coffee.