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Caffeine has health benefits, but don't overdo it
WALNUT CREEK, Calif. - Sarah Pullman has what she calls a long-standing, cyclical relationship with caffeine. When she doesn't have her morning latte, the John F. Kennedy University graduate student feels sleepy and her head pounds. When she has too much caffeine, she feels jittery. But most of the time, caffeine makes her feel perky.
"I'm able to focus and concentrate better," says Pullman,...
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