The Value of Iceberg Lettuce

Vitamin K — found in iceberg and other types of lettuce — lowers the risk of hip fracture among middle-aged and older women. Research from the Nurse's Health Study, which included 12,700 women, ages 38 to 63, showed that 20 percent of women who consumed lesser amounts of vitamin K than their counterparts had a 43-percent higher hip fracture risk.

-American Journal of Clinical Nutrition, 1999; 69