Vitamin D and Immunity, Lots of Evidence
Overview
Dr. John Campbell reviews studies on vitamin D deficiency and immunity, including links to influenza and COVID-19, with Public Health England advice. He walks through the sources he cites.
On Hacker News
Cited in COVID-era threads as a physician's evidence-based argument that vitamin D is cheap, low-risk and worth considering.
Topics
Sources
Video by Dr. John Campbell, played through YouTube.
Data and selection notes
HN summaries and labels may contain AI errors. HN dates refer to discussions, not video publication.
HN Library: HackerTube export (2026-10-31) and open-index/hacker-news. Upstream summaries and classifications may contain AI errors.
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Selection checks
- SaaS & AI candidates: Topic keywords do not match
- Editor-approved picks: Editorial review is required
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