There's an old riddle: " What's the difference between a gum-chewing gi
rl and a cud-chewing cow?" The intelligent looks on the cow's face. "Well, the girl's suddenly looking pretty smart. Studies have shown that chewing gum increases blood flow to the brain.Australian researchers recently found that after 20 minutes of gum chewing,alertness went up by almost 19 percent. Chewing gum also lowers levels of the stress hormone cortisol by about 16 percent, according to the study.
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