Best Calcium products by transparent scoring (2026)
Single-ingredient products scored by public rules: dose fit, label transparency, data verification, company transparency, third-party testing. Not a measure of efficacy or safety. No paid placement.
Products ranked: 172 · Reference range: 1,300 – 2,500 mg (source) · Updated 2026-11-01
Reference range: from 100% of the US Daily Value to the upper reference value.
Single-ingredient products only.
Left out of this list: combination products (a single-ingredient list exists) (484)
Dose fit 40 · Label transparency 20 · Data verification 15 · Company transparency 15 · Third-party test 10 (No data (not scored); the other four parts are rescaled from 90 to 100) — Methodology · Calcium →
| Rank | Product | Per day | Score | Breakdown | ||||||||||||||||
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| 1 tie |
Alka-Seltzer Extra Strength Heartburn Relief Chews Assorted Fruit Bayer · US NIH DSLD |
1,502 mg | 94.4 | Breakdown
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| 1 tie |
Calcium Citrate 300 mg The Vitamin Shoppe · US NIH DSLD below reference range |
1,200 mg | 94.4 | Breakdown
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| 3 tie |
Calcium Citrate Nature's Way · US NIH DSLD below reference range |
1,000 mg | 84.2 | Breakdown
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| 3 tie |
Chelated Calcium Solgar · US NIH DSLD below reference range |
1,000 mg | 84.2 | Breakdown
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| 5 | Calcium Pyruvate Allergy Research Group · US NIH DSLD below reference range |
840 mg | 78.7 | Breakdown
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| 6 tie |
Calcium 600 Rugby · US NIH DSLD below reference range |
1,200 mg | 77.7 | Breakdown
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| 6 tie |
Calcium 600 mg Major Pharmaceuticals · US NIH DSLD below reference range |
1,200 mg | 77.7 | Breakdown
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| 8 tie |
CALVIN TABLET 600 MG MEDISPEC (M) SDN. BHD. · Malaysia NPRA |
1,500 mg | 76.7 | Breakdown
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| 8 tie |
Mineral Powder Global Health Trax Canada Inc. · Health Canada LNHPD |
1,500 mg | 76.7 | Breakdown
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| 8 tie |
North Coast Naturals - Organic Calcium (Powder) Fit Foods LP · Health Canada LNHPD |
1,500 mg | 76.7 | Breakdown
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| 11 | OSCAL123 CALCIUM MILK Plus Caplet NATURES SCIENCEUTICALS SDN BHD · Malaysia NPRA below reference range |
1,278 mg | 75.9 | Breakdown
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| 12 | Calcium Complex Bronson · US NIH DSLD below reference range |
1,125 mg | 75.1 | Breakdown
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| 13 tie |
Calcium 1250mg Chewable Fruit-Flavoured Tablets Alison Pharmaceutical Manufacturing Inc. · Health Canada LNHPD below reference range |
1,250 mg | 75.0 | Breakdown
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| 13 tie |
Calcium 1250mg Chewable Fruit-Flavoured Tablets Rayan Pharma Inc. · Health Canada LNHPD below reference range |
1,250 mg | 75.0 | Breakdown
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| 13 tie |
Chewable Vanilla-flavoured Calcium 1250mg Tablets Alison Pharmaceutical Manufacturing Inc. · Health Canada LNHPD below reference range |
1,250 mg | 75.0 | Breakdown
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| 13 tie |
Chewable Vanilla-flavoured Calcium 1250mg Tablets Rayan Pharma Inc. · Health Canada LNHPD below reference range |
1,250 mg | 75.0 | Breakdown
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| 17 | Calcium Lactate BulkSupplements.com · US NIH DSLD below reference range |
1,040 mg | 74.4 | Breakdown
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| 18 tie |
Calcium Carbonate BulkSupplements.com · US NIH DSLD below reference range |
1,000 mg | 73.1 | Breakdown
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| 18 tie |
Calcium Citrate Freeda · US NIH DSLD below reference range |
1,000 mg | 73.1 | Breakdown
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| 20 | Maximum Calcium 650mg GFR Pharma Ltd. · Health Canada LNHPD below reference range |
650 mg | 71.1 | Breakdown
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| 21 tie |
Calcium 600 JAMP Pharma Corporation · Health Canada LNHPD below reference range |
600 mg | 69.4 | Breakdown
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| 21 tie |
Calcium 600 mg Tablets International Vitamin Corporation · Health Canada LNHPD below reference range |
600 mg | 69.4 | Breakdown
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| 21 tie |
Calcium Carbonate 1500 mg GFR Pharma Ltd. · Health Canada LNHPD below reference range |
600 mg | 69.4 | Breakdown
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| 24 | Nature's Bounty Calcium 600 mg with Vitamin D3 800IU Tablets Nature's Bounty · Malaysia NPRA below reference range |
649 mg | 67.8 | Breakdown
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| 25 | Calcium Pyruvate NutriCology · US NIH DSLD below reference range |
840 mg | 67.6 | Breakdown
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| 26 tie |
Calcium Thorne · US NIH DSLD below reference range |
500 mg | 67.1 | Breakdown
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| 26 tie |
Calcium Citrate Calcium + Soy 21st Century · US NIH DSLD below reference range |
500 mg | 67.1 | Breakdown
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| 28 tie |
Cava- Calcium 1000¿ Çava Pharma · Health Canada LNHPD below reference range |
1,000 mg | 66.4 | Breakdown
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| 28 tie |
Mayaka Calcium Solution 1000 mg liquid Mayaka International Inc. · Health Canada LNHPD below reference range |
1,000 mg | 66.4 | Breakdown
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| 28 tie |
NU-CAL One-a-day Odan Laboratories Ltd. · Health Canada LNHPD below reference range |
1,000 mg | 66.4 | Breakdown
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| 31 | Calcium Citrate Windmill · US NIH DSLD below reference range |
800 mg | 66.2 | Breakdown
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| 32 | Calcium 500mg GFR Pharma Ltd. · Health Canada LNHPD below reference range |
500 mg | 66.0 | Breakdown
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| 33 | Calcium Citrate Allergy Research Group · US NIH DSLD below reference range |
450 mg | 65.4 | Breakdown
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| 34 | Rolaids Soft Chews Ultra Strength Kenvue Canada Inc. · Health Canada LNHPD below reference range |
471 mg | 65.0 | Breakdown
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| 35 | Calcium Citrate Thorne Research · US NIH DSLD below reference range |
450 mg | 63.2 | Breakdown
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| 36 | Calcium Citramate Thorne Research · US NIH DSLD below reference range |
420 mg | 62.1 | Breakdown
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| 37 | BLACKMORES CALCIUM + D3 TABLETS Blackmores · Malaysia NPRA below reference range |
632 mg | 61.6 | Breakdown
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| 38 | Calcium Citrate 630 mg plus D3 500 IU Nature's Truth · US NIH DSLD below reference range |
630 mg | 60.4 | Breakdown
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| 39 | Calcium Carbonate NOW · US NIH DSLD below reference range |
600 mg | 59.4 | Breakdown
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| 40 | Calmix Nutri-Dyn Products Ltd. DBA Professional Health Products · Health Canada LNHPD below reference range |
750 mg | 57.9 | Breakdown
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| 41 | Calcium 600 GNC Women's · US NIH DSLD below reference range |
600 mg | 57.2 | Breakdown
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| 42 | Calcium Lactate NOW · US NIH DSLD below reference range |
510 mg | 56.3 | Breakdown
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| 43 | Alka-Seltzer Relief Chews Bayer Inc. · Health Canada LNHPD below reference range |
300 mg | 55.8 | Breakdown
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| 44 | Phospholow Euro-Pharm International Canada Inc. · Health Canada LNHPD below reference range |
167 mg | 54.6 | Breakdown
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| 45 tie |
Calcium 650 mg Nutricorp International · Health Canada LNHPD below reference range |
650 mg | 54.4 | Breakdown
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| 45 tie |
MegaCal Calcium Jamieson Laboratories Ltd./ Nutricorp International · Health Canada LNHPD below reference range |
650 mg | 54.4 | Breakdown
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| 47 | Calcium Citrate NutriCology · US NIH DSLD below reference range |
450 mg | 54.3 | Breakdown
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| 48 tie |
CAL-C 625 Calcium Tablets 625 mg Jaapharm Canada Inc. · Health Canada LNHPD below reference range |
625 mg | 53.6 | Breakdown
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| 48 tie |
Cal 625 Calcium Tablets 625 mg (from oyster shell) Jaapharm Canada Inc. · Health Canada LNHPD below reference range |
625 mg | 53.6 | Breakdown
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| 50 tie |
CALADAY¿ TAB 600MG Pharmascience Inc. / Pendopharms, Division of Pharmascience Inc. · Health Canada LNHPD below reference range |
600 mg | 52.7 | Breakdown
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100 products were scored; the top 50 are listed here. See the rest in the product list.
For information only; not medical advice. Talk to a doctor or pharmacist before starting or stopping any supplement.