Calcium and vitamin D work together for bone health. Learn the optimal dosage and timing.
Based on our database, there are no known harmful interactions between calcium and vitamin d. However, this does not guarantee safety — consult a healthcare provider.
| Standard | calcium | vitamin d |
|---|---|---|
| US (FDA) | 1000 / 2500 mg (RDA/UL) | 600 / 4000 IU (RDA/UL) |
| EU (EFSA) | 1000 / 2500 mg (RDA/UL) | 600 / 4000 IU (RDA/UL) |
| AU (TGA) | 1000 / 2500 mg (RDA/UL) | 600 / 4000 IU (RDA/UL) |
| CN (CNS) | 800 / 2000 mg (RDA/UL) | 400 / 800 IU (RDA/UL) |
| JP (MHLW) | 800 / 2300 mg (RDA/UL) | 600 / 4000 IU (RDA/UL) |
Values shown as RDA (Recommended Dietary Allowance) / UL (Tolerable Upper Intake Level). Sources: NIH, FDA, EFSA, FSANZ, CNS, MHLW.
Yes. Vitamin D increases calcium absorption from 10-15% to 30-40%. Many calcium supplements already include vitamin D.
This page only checks one pair. Use NutriAudit to check your full supplement stack for interactions, duplicates, and safe dosages.
Not medical advice. Always consult a qualified healthcare professional for personal medical decisions.