Caffeine's jolts continue all day. (Lifelines).People who consume caffeine caffeine (kăfēn`), odorless, slightly bitter alkaloid found in coffee, tea, kola nuts (see cola), ilex plants (the source of the Latin American drink maté), and, in small amounts, in cocoa (see cacao). are more likely to have increased blood pressure, feel more stressed, and produce more stress hormones Stress hormones such as cortisol and norepinephrine are released at periods of high stress. The hormone regulating system is known as the endocrine system. Cortisol is believed to affect the metabolic system and norepinephrine is believed to play a role in ADHD than on days when they take in no caffeine. Participants in a recent Duke University study consumed either placebo pills or 500 milligrams of caffeine (about the amount in four cups of coffee) in the form of two pills, with the second pill taken no later than 1:00 p.m. At no time did the individuals know whether what they were taking contained caffeine or a placebo. Researchers found that on days that participants took caffeine pills, they had slightly higher blood pressure, an average of 32 percent more of the stress hormone epinephrine, and higher stress levels. They also found that caffeine's effects were undiminished until bedtime bedtime Sleep disorders The time when one attempts to fall asleep–as distinguished from the time when one gets into bed . (Psychosomatic Medicine psychosomatic medicine (sī'kōsōmăt`ĭk), study and treatment of those emotional disturbances that are manifested as physical disorders. ) |
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