Does vitamin D help your body fight the flu shot?

Original Title

Vitamin D, leptin and impact on immune response to seasonal influenza A/H1N1 vaccine in older persons

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Summary

Scientists checked if people with more vitamin D in their blood had a stronger immune reaction to the flu vaccine.

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Surprising Findings

Vitamin D showed no correlation with antibody response to the flu vaccine, despite its known immunomodulatory role.

Many prior studies and public health messages suggest vitamin D enhances vaccine response—this study found zero link to antibodies, the gold standard for vaccine effectiveness.

Practical Takeaways

Don’t take vitamin D supplements solely to boost flu vaccine effectiveness.

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