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Vitamin D*calculator™ for Children

Use this tool to calculate the estimated additional Vitamin D intake needed for children to reach their target vitamin D serum level (40-60 ng/ml recommended by our scientist panel).

Don’t know your current serum level?

Need more help on what to do with your D calculator results? Read here

FLASH SALE - THIS WEEKEND ONLY! Save 20% on select test kits when measuring essential & toxic elements. Sale ends Monday 6/22/2026

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