In a collaborative study at Creighton University in Nebraska and the University of Miami, Florida, researchers showed that caffeine may interfere with vitamin D absorption. The results, published in the "Journal of Steroid Biochemistry and Molecular Biology," demonstrated that the higher the level of caffeine, the more it interfered with vitamin D absorption. The study suggested that caffeine did this by reducing the expression of vitamin D receptors on osteoblasts in the body -- the cells responsible for producing bone.
Caffeine Vs. Calcium
Caffeine can also interfere with the absorption of calcium. A study published in the journal "Osteoporosis International" showed that just a cup of coffee can slightly reduce calcium absorption in the body and increase its loss in urine due to its diuretic effect. Additionally, bone loss has been shown in people with low milk or low total calcium intake who drink 2 or more cups of coffee per day, according to a study of 205 postmenopausal women published in the "American Journal of Clinical Nutrition." And the results of a study in Norway, in which almost 20,000 women participated, suggested that women who drink 9 or more cups of coffee per day may be at risk of bone fracture. Another study in the "American Journal of Clinical Nutrition" even showed that bone mineral density may be reduced in older women who drink cola every day, compared with those who drink it less than once every month.
我在反思这一年，特别是新冠疫情期间，外出少，喝咖啡比往年都多（喝咖啡会加奶，但不加糖）
有没人知道喝咖啡与VD降低有没有关系？
我替你反思了，应该是年龄。在加拿大，没见年轻人侧ＶD，只有上年龄的才开始侧，可能也分人分家庭医生。上年龄的也不给侧。
更年期也应该开始了，不论你多健康多会保养多有知识，都阻止不了这个自然规律。身体开始有异样了。几年前，我就跟你说，想干啥就干啥，趁着更年期还没到来。如果你还年轻（我不知道你的年龄），算我白说。
链接
年龄是主要因素。年轻时什么毛病都没有，年龄大的就不一定了。年龄是最主要的风险因素。
抽的节奏。
只是因为看到研究认为，咖啡与骨质酥松相关，所以才联想到VD3.
用“趴”，表示体位状态。
“爬”，是肢体动作。
1）链接
2）链接
3）链接
还有很多呢，这里仅贴了3个医学研究专业网上的。。。
记得有讨论血液里的值也不一定准。
坚持每天晒太阳，一般人就不用担心维D缺乏。
https://www.livestrong.com/article/464884-does-caffeine-affect-the-absorption-of-vitamins-or-minerals/ Caffeine Vs. Vitamin D
In a collaborative study at Creighton University in Nebraska and the University of Miami, Florida, researchers showed that caffeine may interfere with vitamin D absorption. The results, published in the "Journal of Steroid Biochemistry and Molecular Biology," demonstrated that the higher the level of caffeine, the more it interfered with vitamin D absorption. The study suggested that caffeine did this by reducing the expression of vitamin D receptors on osteoblasts in the body -- the cells responsible for producing bone.
Caffeine Vs. CalciumCaffeine can also interfere with the absorption of calcium. A study published in the journal "Osteoporosis International" showed that just a cup of coffee can slightly reduce calcium absorption in the body and increase its loss in urine due to its diuretic effect. Additionally, bone loss has been shown in people with low milk or low total calcium intake who drink 2 or more cups of coffee per day, according to a study of 205 postmenopausal women published in the "American Journal of Clinical Nutrition." And the results of a study in Norway, in which almost 20,000 women participated, suggested that women who drink 9 or more cups of coffee per day may be at risk of bone fracture. Another study in the "American Journal of Clinical Nutrition" even showed that bone mineral density may be reduced in older women who drink cola every day, compared with those who drink it less than once every month.
家医诊所有2位医生，1位是老女医生，我跟她多年了，病人极多，她年纪大了现在每周仅3天，得排队等。 另1位是8年前才来的，男的很年轻，跟share 同个office，没啥病人；我年检往往属例行公事，就找那年轻男的，时间我选随时可看。血检呢，他就翻开往年记录照抄，要求测VD他也不理。这下我不干了，从去年还是找那位老医生吧，老道灵活，花时间等还是值得D。