Application of xylan in preparing medicine or food for preventing or treating osteoporosis

The invention relates to the prevention and treatment of osteoporosis, in particular to an application of xylan (polyxylose) in preparing medicine or food for preventing or treating osteoporosis. According to the invention, xylan with high purity is used in animal experiments, which proves that the xylan can obviously improve bone metabolism, improve levels of vitamin D, PINP and BALP in blood, reduce levels of CTXI and urine hydroxyproline in the blood, and reduce urine calcium loss, thereby playing a role in inhibiting bone resorption and promoting bone formation, animals ingestin gthe xylanhas higher bone mass and bone density and more excellent bone biomechanical property than animals ingesting cellulose, lignin, pectin, fructan, glucomannan, or without ingesting any dietary fiber; the xylan is suitable for further being developed as medicine or food for the prevention or treatment of osteoporosis. 本发明涉及骨质疏松的防治，具体涉及木聚糖（聚木糖）在制备预防或治疗骨质疏松的药物或食品中的应用。本发明利用高纯度的木聚糖进行动物试验证明，木聚糖可以显著改善骨质代谢，提高血液维生素D、PINP、BALP水平，降低血液