Haitians celebrate their independence from France on Jan. 1 each year with a traditional squash soup called soup joumou. Courtesy of Whole Foods hide caption

itoggle caption Courtesy of Whole Foods

Anna Hu at the Ao Hua Farmers Market in Shanghai. After years of working long hours and eating only in restaurants, Hu has learned how to cook vegetables and eat more healthfully. Eliza Barclay/NPR hide caption

itoggle caption Eliza Barclay/NPR

Rachel Zayas, a registered nurse, sets up the shift board for the night shift at the Cleveland Clinic. Chuck Crow/The Plain Dealer /Landov hide caption

itoggle caption Chuck Crow/The Plain Dealer /Landov

People who ate a diet high in omega-3 fatty acids and vitamin D, which are commonly found in fish, and in vitamins C, E and B, which are often found in vegetables, were less likely to have their brains shrink, and were more likely to score higher on the memory and thinking tests, a study found. iStockphoto.com hide caption

itoggle caption iStockphoto.com