过量咖啡摄入可能削弱老年女性骨密度

弗林德斯大学研究人员对近10000名65岁以上女性进行了为期10年的追踪研究，发现过量咖啡摄入与骨密度降低存在关联1。研究结果表明，每天摄入5杯以上咖啡可能削弱骨密度，而每天2至3杯的适度咖啡摄入则无害1。相比之下，茶饮与略高的髋部骨密度相关，这一差异虽然幅度较小，但在统计学上具有显著意义1。

研究人员认为，茶中含有的儿茶素可能促进骨形成，而咖啡中的咖啡因则可能干扰钙吸收和骨代谢1。该研究已发表在《营养学》期刊2025年第17卷第23期上，获得美国国家衰老研究所和国家关节炎及肌肉骨骼皮肤病研究所的资金支持1。研究合作者Enwu Liu指出："即使骨密度的小幅改善也能在大群体中转化为更少的骨折"1。

Researchers from Flinders University tracked nearly 10,000 women aged 65 and older over a decade and found that high coffee consumption is associated with lower bone density, while tea drinking correlates with slightly elevated hip bone density 1. The study, published in Nutrients in 2025 (Volume 17, Issue 23), examined how caffeine intake affects bone health in this demographic 1.

The research revealed that consuming five or more cups of coffee daily may weaken bone density, whereas moderate coffee intake of two to three cups per day appears harmless 1. Tea consumption showed the opposite effect, with the catechins found in tea potentially promoting bone formation 1. According to Enwu Liu, a researcher involved in the study, "even small improvements in bone density can translate into fewer fractures across large populations" 1.

The mechanism behind these findings suggests that caffeine in coffee may interfere with calcium absorption and bone metabolism, while tea's beneficial compounds support bone development 1. The research was supported by funding from the National Institute on Aging (NIA) and the National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) 1.