Menaquinone-4 (Vitamin K2) is a vitamin K compound used as a hemostatic agent, and also as adjunctive therapy for the pain of osteoporosis.

Vitamin K 补充逆转了高脂饮食引起的骨质退化，通过调节成骨细胞和破骨细胞的活性，并在高脂饮食诱导的肥胖小鼠中防止骨质流失[1]。

Forty-two male, 4-week-old C57BL/6J mice.?an automated constant-temperature humidity system was used to maintain a temperature of 23°C ± 2°C and humidity of 60% ± 3% for the animals.?The animals were provided with feed and drink ad libitum.?For environmental adaptation, the animals had 1 week of circulation, and then were provided with the experimental diet after being randomly divided into 6 groups (7 animals in each group;?randomized block design).?The AIN-93G diets consisted of a normal diet (N), normal diet + vitamin K1 (N-K1), normal diet + vitamin K2 (N-K2), 45% high-fat diet (HF), 45% high-fat diet + vitamin K1 (HF-K1), and a 45% high-fat diet + vitamin K2 (HF-K2).?The vitamin K1 and vitamin K2 contents were 200 mg/1,000 g, and the diet was provided in pellet form.?Food intake amount was measured every other day.?Body weight was measured once a week, and the food efficiency ratio (FER) was calculated by dividing the increased body weight from day1 to the final day by the food intake amount during the experiment period.?For fat amount measurement, the epididymal fat, perirenal fat, and retroperitoneal fat were extracted from dead animal subjects, were washed with 0.9% NaCl, dried by filter paper, and then were weighed[1].