vitamin D
2 entries tagged vitamin D. All writing.
SEPTEMBER 23, 2026
Do Calcium and Vitamin D Supplements Actually Prevent Fractures and Falls?
A BMJ systematic review of 69 randomised trials and 153,902 adults found calcium alone, vitamin D alone, and the two combined all produced little to no meaningful reduction in fractures or falls. One combination did clear statistical significance — but missed the review's own bar for a clinically meaningful benefit, and the signal traces largely to a single 1992 French nursing-home trial. Here is what the numbers say, outcome by outcome, and why "statistically significant" and "worth taking" turned out to be two different questions.
SEPTEMBER 10, 2026
What a Kidney Stone Actually Is, and Why It Forms
About one adult in ten will make a kidney stone. Before the questions about water, calcium and what to eat, the first one: what a stone actually is, what it is made of, and why it forms in some kidneys and not others — read from the studies. With a postscript on hard water, distillers, and calcium pills.