Everyone knows soy is great for the body, but new research shows it helps the mind too. Pharmacologists at King’s,  College  in London found that people who ate a highsoy diet for

 10 weeks developed better memory than those who consumed the same amounts of protein, fat, and calories, but without the soy. The results were not unexpected: Soy is rich in isoflavone hytoestrogens — antioxidant chemicals that mimic estrogen's effects on the brain--and previous studies have shown that estrogen improves memory . But researcher Sandra Fife was impressed that "evena three-month change of diet can lead to improved memory"--  so long as you gulp the equivalent of a quarter-pound of tofu, or a pint of soy milk, every day.