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...night. According to a study co-authored by Charles A. Czeisler, a professor of sleep medicine at the Medical School, frequent, small amounts of caffeine can help maintain cognitive abilities for extended periods. On average, a cup of brewed coffee from the dining hall contains about 100 milligrams (mg) of caffeine, as opposed to an 8.2 ounce can of Red Bull which has about 80 mg. Interestingly, Diet Coke outweighs regular Coke by a score of 46 mg to 34, so those looking to stay slim should plan on staying up a little later. Though it might be tempting...
...other hand, says Wyatt, people don't seem to build up a tolerance to melatonin, and even small amounts, like the 0.3-mg dose used in the study, are effective. Studies show also that melatonin is safe for adults, at least in the short term, with few side effects. "But the first thing I recommend before starting anything," says Wyatt, "is to have a chat with your primary-care doctor...
...Vitamin D and Calcium: ? Vitamin D (400 IU to 600 IU needed daily): sunlight (as much as 20,000 IU in 15 min. at midday), salmon (103 IU per oz., or 28 g), fortified milk (12.5 per fl. oz. [30 ml]), fortified orange juice (12.5) ? Calcium (1,000 mg to 1,500 mg needed daily): Atlantic sardines (108 mg per oz. [28 g]), canned salmon (68), low-fat plain yogurt (52), tofu (30), canned white beans (21) and regular skim milk...
...Calcium (1,000 mg to 1,500 mg needed daily): Atlantic sardines (108 mg per oz. [28 g]), canned salmon (68), low-fat plain yogurt (52), tofu (30), canned white beans (21) and regular skim milk...
...executive functions like attention, task management and concentration are located. This is consistent with what the Austrian scientists reported last month at the Radiological Society of America's annual conference in Chicago. Dr. Florian Koppelstaetter and his colleagues at the Medical University in Innsbruck gave 15 male volunteers 100 mg each of caffeine?about the same amount as in two cups of coffee?and then tested their short-term memory. Not only did the caffeine drinkers perform significantly better than those on placebos (all the subjects were in both the caffeine and the control groups in different rounds of testing...