Three giant vitamin D trials found almost nothing. The author still takes it (dynomight.net)
The post walks through the big randomized vitamin D trials, where supplementation barely moved all-cause mortality. By the author's own math, if the true hazard ratio is 0.96, a daily pill buys you about 0.48 years of life - roughly 8.6 minutes per pill.
The thread sharpened the real fault line: a doctor running annual vitamin D labs now sees more patients with too much than too little, after they took podcast advice and overdosed a fat-soluble hormone that lingers for months.
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