https://atlantak.com/%eb%b9%84%ed%83%80%eb%af%bc-k1-%eb%85%b8%ec%9d%b8-%ea%b3%a8%ec%a0%88-%ec%9c%84%ed%97%98-%eb%82%ae%ec%b6%98%eb%8b%a4/
"비타민 K1, 노인 골절 위험 낮춘다"