Those who are deficient in vitamin K have been shown to have a 30 percent higher risk of hip fractures than those with higher intakes. A relative of coenzyme Q10, K2 can be found in something called natto—a Japanese fermented soybean dish. (Samurai warriors would eat natto to increase their strength and quicken their reflexes.)
Vitamin K2 can also be found in low-fat cottage cheese, chicken, and certain cheeses. It doesn't come from milk and isn't found in yogurt, as it's a waste product of bacteria that ferment milk into cheese.
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