2 is better than 1 or 3 or 4

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Getting the right dose of caffeine to boost memory

Magic for memory. Every student knows the value of coffee when the going gets tough, but researchers at the University of California have demonstrated the importance of getting the dose right to achieve optimum effect.
A group of 160 adults were given a selection of images to study. Afterwards they were given a 200mg caffeine pill or a placebo. The idea of giving the caffeine boost after studying was to isolate memory rather than alertness when actually studying.
The following day the caffeine group did considerably better at identifying the images from the previous day than those who had been given the placebo. 200mg of caffeine is equivalent to two standard expressos. The test results were not duplicated when groups took 100mg or 300mg, implying that a double expresso is truly magic for your memory!

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