Tuesday, 20 October 2026 Updated 17 min ago
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Scientists warn a popular vitamin D supplement may have a hidden downside

Not all vitamin D supplements are created equal, and new research suggests that one popular form may have an unexpected downside.

ScienceDaily reports: Not all vitamin D supplements are created equal, and new research suggests that one popular form may have an unexpected downside.

Scientists found that taking vitamin D2 can actually lower the body's levels of vitamin D3, the form naturally produced by sunlight and more effective at boosting overall vitamin D. Previous studies also suggest that vitamin D3 may provide stronger immune protection against viruses and bacteria.

This science story centres on the United States.

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Research developments are often early steps — further studies typically determine how significant they prove to be.

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United States · Americas
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ScienceDaily
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Section
Science

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