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
Evidence:Strong
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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
Osteoporosis prevention
1,000-1,200mg total daily (diet + supplements) with vitamin DStrong
Bone density maintenance
500-600mg supplemental calcium twice dailyStrong
PMS symptoms
1,200mg dailyModerate
| 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.
Find a Calcium with the right dose
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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
- Meta-analysisBolland MJ, Leung W, Tai V, et al. (2015). Calcium intake and risk of fracture: systematic review. BMJ. DOI PubMed
- Meta-analysisTai V, Leung W, Grey A, Reid IR, Bolland MJ (2015). Calcium intake and bone mineral density: systematic review and meta-analysis. BMJ. DOI PubMed
- Yong Y, Giovannucci J, Pang SN, Hong W, et al. (2025). Coronary Artery Calcium Density and Risk of Cardiovascular Events: A Systematic Review and Meta-Analysis.. JACC. Cardiovascular imaging. DOI PubMed
- Sabeti MA, Karimpourtalebi N, Shahravan A, Dianat O (2024). Clinical and Radiographic Failure of Nonsurgical Endodontic Treatment and Retreatment Using Single-cone Technique With Calcium Silicate-based Sealers: A Systematic Review and Meta-analysis.. Journal of endodontics. DOI PubMed
- Sunlakawit C, Chaimanakarn C, Srimaneekarn N, Osiri S (2024). Effect of Calcium Hydroxide as an Intracanal Medication on Dentine Fracture Resistance: A Systematic Review and Network Meta-Analysis.. Journal of endodontics. DOI PubMed
- Meta-analysisTan L, He R, Zheng X (2024). Effect of vitamin D, calcium, or combined supplementation on fall prevention: a systematic review and updated network meta-analysis.. BMC geriatrics. DOI PubMed
Show 5 more references
- Bickelmann FV, Leitzmann MF, Keller M, Baurecht H, et al. (2023). Calcium intake in vegan and vegetarian diets: A systematic review and Meta-analysis.. Critical reviews in food science and nutrition. DOI PubMed
- Meta-analysisManoj P, Derwin R, George S (2023). What is the impact of daily oral supplementation of vitamin D3 (cholecalciferol) plus calcium on the incidence of hip fracture in older people? A systematic review and meta-analysis.. International journal of older people nursing. DOI PubMed
- Liang L, Kung JY, Mitchelmore B, Cave A, et al. (2022). Comparative peripheral edema for dihydropyridines calcium channel blockers treatment: A systematic review and network meta-analysis.. Journal of clinical hypertension (Greenwich, Conn.). DOI PubMed
- Ma Y, Yang L, Luo X, et al. (2024). Clinical efficacy of low-dose aspirin combined with calcium in preventing preeclampsia: A systematic review and meta-analysis.. Pregnancy hypertension. DOI PubMed
- Hofmeyr GJ, Manyame S, Medley N, Williams MJ (2022). Calcium for pre-eclampsia prevention: A systematic review and network meta-analysis.. The Cochrane database of systematic reviews. DOI PubMed