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  "path": "/releases/2026/05/260523021820.htm",
  "publishedAt": "2026-05-23T10:38:26.000Z",
  "site": "https://www.sciencedaily.com",
  "textContent": "A surprising study suggests vitamin D2 supplements may reduce the body’s levels of vitamin D3 — the more effective form of vitamin D. Researchers found D3 not only boosts vitamin D status more efficiently, but may also play a unique role in helping the immune system fight off viruses and bacteria. The discovery is prompting scientists to rethink whether D3 should become the preferred choice for supplementation.",
  "title": "Scientists warn popular vitamin D supplement may have a “previously unknown” downside"
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