What dose of Vitamin D3 (Cholecalciferol) & Calcium Carbonate is effective for Fracture risk?

Calcium Carbonate at 1000 mg lands inside the studied 1000-1500 mg window. DoseRank scores this product's dose fit at 56 out of 100.

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The short answer · Fracture risk

Take vitamin d3 (cholecalciferol) & calcium carbonate for fracture risk. This is the one to buy.

Q: How much does the best Fracture risk supplement cost?

21st Century, Calcium Plus D3, 90 Tablets works out at $0.07 per serving. $0.07 per serving — low price tier for this outcome. Nothing else in this ranking costs less per serving.

21st Century, Calcium Plus D3, 90 Tablets

4.7· 11,111 ratings· $0.07/serving

DoseRank score92

Calcium Carbonate 1000 mg — inside the studied 1000-1500 mg window

Of 6,470 products scored for Fracture risk, 21st Century, Calcium Plus D3, 90 Tablets ranks #1 with a DoseRank score of 92. Vitamin D3 (Cholecalciferol) and Calcium Carbonate are the strongest evidence signals for this outcome.

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Cheaper alternative$0.03 per serving21st Century, 600+D3, Calcium & Vitamin D3 Supplement, 400 Tablets

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The form“Why Vitamin D3 (Cholecalciferol) & Calcium Carbonate?”

Vitamin D3 (Cholecalciferol) and Calcium Carbonate are the strongest evidence signals for this outcome.

Vitamin D3 (Cholecalciferol)The pick
Strong evidence · 20 mcg
The form made by skin on sun exposure and used in most supplements; converts to active calcitriol and raises serum 25(OH)D more effectively than D2.
Calcium CarbonateThe pick
Strong evidence · 1000 mg
The cheapest, most concentrated calcium form at 40% elemental; needs stomach acid, so take with food and expect weak uptake on acid-reducing medications.
Calcium Citrate
Strong evidence · 1000 mg
Calcium bound to citric acid; absorbed well even without food or with low stomach acid, so it suits older adults and PPI users.

Buy the #1 pick

The dose“Is the dose actually effective?”

Calcium Carbonate at 1000 mg lands inside the studied 1000-1500 mg window.

Calcium Carbonate

Studied window 1000-1500 mg · this pick 1000 mg

The ranking“Why should I trust this pick?”

Strong trust signals — consistently high marks from verified buyer ratings. Each product gets a DoseRank score blending clinical strength, evidence, dose fit, trust and value. Retailer links may be affiliate links — the scoring model decides placement, never payment from a brand.

6,470 products scored
Never paid placement
Evidence level: Strong · 92
525 brands
18 ingredients

See the full analysis — every score, every product How the ranking works

The price“Can I do better than $0.07 a serving?”

$0.07 per serving — low price tier for this outcome. Nothing else in this ranking costs less per serving.

Ready?

The #1 pick is $0.07 a serving.

21st Century, Calcium Plus D3, 90 Tablets — in stock at a tracked retailer.

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21st Century, Calcium Plus D3, 90 Tablets ranks #1 for Fracture risk with a DoseRank score of 92. The score blends clinical strength, evidence, dose fit, trust signals and value across 6,470 products scored for this outcome.

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