In a recent study of 672 adults, those who had the highest vitamin K levels were less likely to have osteoarthritis of the hands and knees than people who had the lowest levels.
Theory: Insufficient vitamin K could affect proteins that build and maintain bone and cartilage.
Self-defense: Get the recommended daily intake of vitamin K—65 micrograms (mcg) for women and 80 mcg for men.
Good sources: Spinach, broccoli and olive oil.
Caution: If you take a blood thinner, vitamin K can reduce the drug's effectiveness.
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