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How Much Vitamin D Do You Need?
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Vitamin D deficiency is extremely common, affecting an estimated 1 billion people worldwide. Adequate levels (40-60 ng/mL) support bone health, immune function, and mood regulation.
Disclaimer: This calculator provides estimates only. Vitamin D supplementation should be guided by blood test results and medical advice. High doses can cause toxicity. Consult your healthcare provider.
Common use cases:
- Estimating supplement dose from blood levels
- Understanding vitamin D target ranges
- Discussing supplementation with your doctor
Frequently Asked Questions
Maria Gonzalez
Registered Dietitian, RD, MPH
Maria is a Registered Dietitian with a Master's in Public Health. She focuses on evidence-based nutrition assessment tools including BMI, calorie calculations, and body composition analysis.
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