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A recent multi-ethnic study conducted by Tufts’ researchers suggests vitamin K-rich foods like leafy greens and vegetable oils may help protect our health as we age. Compared to levels of vitamin K seen with adequate dietary intake, low vitamin K levels in older adults were associated with a 19 percent higher risk of death.
There are no data to indicate vitamin K supplements are beneficial. The blood levels of vitamin K associated with protective effects are easily attainable through a healthy diet that includes regular intake of leafy greens (such as dark green lettuce, kale, and spinach) and some plant oils, especially soybean and canola. Keep in mind that vitamin K is a fat-soluble vitamin, meaning it is only absorbed by the body in the presence of fat—so skip the fat-free salad dressings.