Vitamin D Calculator
Calculate your vitamin D requirements and assess deficiency levels for optimal bone health
Calculate Your Vitamin D Requirements
Additional Factors
Risk factors: limited sun exposure, dark skin, high BMI, malabsorption, certain medications
Vitamin D Serum Level (Optional)
Vitamin D Recommendations
Serum 25(OH)D Reference Ranges
Health Recommendations
Age-Based RDI (IU/day)
Natural Sources
Vitamin D Tips
Essential for bone health and immune function
Take with fat-containing meals for better absorption
Vitamin D3 is more effective than D2
Regular testing helps optimize levels
Understanding Vitamin D
What is Vitamin D?
Vitamin D is a fat-soluble vitamin that's unique because your body can produce it when your skin is exposed to sunlight. It exists in two main forms: D2 (ergocalciferol) from plants and D3 (cholecalciferol) from animals and sun exposure.
Health Benefits
- •Promotes calcium absorption for strong bones
- •Supports immune system function
- •Helps regulate mood and reduce depression
- •May reduce risk of multiple sclerosis and heart disease
Deficiency Risks
Children
Rickets, delayed growth, increased infection risk
Adults
Osteomalacia, bone pain, muscle weakness, increased fracture risk
Risk Factors for Deficiency
- • Limited sun exposure
- • Dark skin pigmentation
- • Advanced age
- • Obesity (BMI > 30)
- • Malabsorption disorders
- • Certain medications
⚠️ Medical Disclaimer
This calculator provides general recommendations based on established guidelines. It cannot replace professional medical advice, diagnosis, or treatment. Individual vitamin D needs may vary based on health conditions, medications, geographic location, and other factors. Always consult with a healthcare provider before starting supplements, especially if you have medical conditions or take medications. Regular blood testing is recommended to monitor vitamin D status.