民间有一种“饮茶易伤骨”的说法,它的主要依据是茶叶含有咖啡碱,这种生物活性物可明显增加尿钙及粪钙的排出,而钙流失将直接诱发骨质疏松症,甚至增加骨折风险。事实果真如此吗?其实,这个观点来源于国外专家对长期饮用咖啡人群的研究。因为咖啡中含有大量咖啡碱,而长期大剂量咖啡碱的摄入会直接对骨密度产生负面作用。但茶叶中所含的咖啡碱浓度并不 Folk has a “tea easy to hurt the bone,” saying that its main basis is that tea contains caffeine, this bioactive substance can significantly increase the excretion of urinary calcium and fecal calcium, and calcium loss will directly induce osteoporosis , And even increase the risk of fracture. In fact, this view comes from foreign experts on the long-term study of drinking coffee. Because coffee contains a lot of caffeine, and long-term high-dose caffeine intake will have a direct impact on bone mineral density. However, the concentration of caffeine contained in tea is not