General Dosage
500-600mg elemental calcium per dose, up to 1,000-1,200mg daily total (diet + supplements)
Maximum dose: 2,500mg/day total from all sources (NIH UL); do not exceed 500-600mg per dose for optimal absorption
Calcium Dosage Guide
This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer
Dosage Recommendations
General recommendation: 500-600mg elemental calcium per dose, up to 1,000-1,200mg daily total (diet + supplements)
Timing: Split doses for best absorption; calcium carbonate with meals, calcium citrate any time • Take with food for best absorption.
Dosage by Condition
| Condition | Recommended Dose | Evidence |
|---|---|---|
| Osteoporosis prevention | 1,000-1,200mg total daily (diet + supplements) with vitamin D | Strong |
| Bone density maintenance | 500-600mg supplemental calcium twice daily | Strong |
| PMS symptoms | 1,200mg daily | Moderate |
Upper limit: 2,500mg/day total from all sources (NIH UL); do not exceed 500-600mg per dose for optimal absorption
Timing & Absorption
Split doses for best absorption; calcium carbonate with meals, calcium citrate any time
Best taken with food for optimal absorption.
References
- Jackson RD, LaCroix AZ, Gass M, et al. (2006). Calcium plus vitamin D supplementation and the risk of fractures. New England Journal of Medicine. DOI PubMed
- Bolland MJ, Leung W, Tai V, et al. (2015). Calcium intake and risk of fracture: systematic review. BMJ. DOI PubMed
- Tai V, Leung W, Grey A, Reid IR, Bolland MJ (2015). Calcium intake and bone mineral density: systematic review and meta-analysis. BMJ. DOI PubMed