The worthlessness of Vitamin D is mildly exaggerated
dynomight.net
June 23, 2026
41 min read
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65/100
Summary
Vitamin D supplementation is deemed ineffective for health improvements unless a person is severely deficient. Correlations exist between vitamin D levels and positive health outcomes, but testing shows no significant benefits from supplements in non-deficient individuals.
Key Takeaways
- Vitamin D supplementation is generally considered ineffective unless an individual is severely deficient, as randomized trials show no significant benefits compared to placebo.
- While vitamin D levels are correlated with positive health outcomes, the evidence does not support a causal relationship for most people.
- The body uses vitamin D primarily to regulate calcium absorption, and without sufficient vitamin D, calcium levels can drop, leading to weak bones.
- Approximately 98% of the population has sufficient storage vitamin D levels, suggesting that supplementation is unnecessary for the vast majority.
Coverage & discussions
Hacker News · dynomight.net
Community discussions
Community Sentiment
Positives
- The article presents a balanced view on Vitamin D studies, acknowledging that while supplementation can benefit those severely deficient, the hype around it may be overstated.
- The discussion highlights the importance of individualized testing and supplementation, suggesting that tailored approaches could lead to better health outcomes.
Concerns
- Critics argue that many studies on Vitamin D lack rigorous randomized controlled trials, raising doubts about their scientific validity and potential biases from supplement companies.
- There is skepticism about the claims of widespread Vitamin D deficiency, with some commenters suggesting that such assertions may be exaggerated or misleading.
