June 23, 2026
Sun’s out, takes out
The worthlessness of Vitamin D is mildly exaggerated
Vitamin D isn’t a miracle after all — but commenters say the backlash went too far
TLDR: The article says vitamin D probably isn’t a magic cure, but it may still help people who are low on it. Commenters mostly agreed the old hype was overblown, then immediately started arguing that sunlight, exercise, or even K2 might deserve the real credit.
The vitamin D discourse has officially entered its messy middle era. The article’s big claim is that vitamin D probably isn’t the miracle pill people once wanted it to be — no, it’s not secretly fixing cancer, depression, heart disease, and your entire life — but it may also not be as useless as the skeptics now insist. The author argues the real story is much less glamorous: if your levels are genuinely low, taking some vitamin D is probably a reasonable bet, even if the evidence is more shrug emoji than slam dunk.
And the comments? Oh, they were ready. One camp praised the piece as a rare internet miracle: a balanced take. Others immediately swerved into alternate theories, with one commenter saying vitamin D in blood may just be a sign that someone is outside exercising, meaning the real health boost could be the walk, not the pill. Another went even further, pointing to sunlight itself and arguing the big benefit might come from other things sunlight does to the body, not vitamin D at all. In other words: the supplement may be catching credit for the sun’s PR team.
Then came the side quests. One reader got distracted admiring how long the post must have taken to write, while another summoned the always-online supplement subplot: What about K2? So the mood was clear — less “vitamin D is dead,” more “the hype was fake, but the dunking may be overhyped too.”
Key Points
- •The article says vitamin D’s broad observational links to positive health outcomes have generally not been confirmed as causal in randomized placebo-controlled trials.
- •The author argues that skepticism toward vitamin D may have over-corrected, and that trials may still provide weak positive evidence when expectations are modest.
- •The article describes vitamin D’s classical role as a signaling molecule involved in calcium absorption and bone maintenance.
- •It explains that UVB exposure in skin produces vitamin D, which is later converted by the liver into a storage form and by the kidneys into an active form when needed.
- •The article states that a common view is that storage vitamin D above about 25 nmol/L is enough for kidney activation, and survey data suggests only about 2% of people are below that threshold.