The short answer · Gastroesophageal reflux or heartburn
Take calcium carbonate for gastroesophageal reflux or heartburn. This is the one to buy.
1
21st Century, Calcium Plus D3, 90 Tablets
4.7· 11,015 ratings· $0.07/serving
DoseRank score87
Calcium Carbonate 1000 mg — inside the studied 500-1000 mg window
Of 4,707 products scored for Gastroesophageal reflux or heartburn, 21st Century, Calcium Plus D3, 90 Tablets ranks #1 with a DoseRank score of 87. Calcium Carbonate is the strongest evidence signal for this outcome.
The form“Why Calcium Carbonate — not Magnesium Oxide?”Evidence Strong evidence
Calcium Carbonate is the strongest evidence signal for this outcome.
- 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.
- Magnesium Oxide
Moderate evidence · 400 mg
High-elemental-content magnesium form (60% Mg by weight) but poorly absorbed and strongly laxative — typically used as a stool softener, not for systemic magnesium repletion.
The dose“Is the dose actually effective?”Dose fit 90
Calcium Carbonate at 1000 mg lands inside the studied 500-1000 mg window.
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21st Century, Calcium Plus D3, 90 Tablets ranks #1 for Gastroesophageal reflux or heartburn with a DoseRank score of 87. The score blends clinical strength, evidence, dose fit, trust signals and value across 4,707 products scored for this outcome.
Calcium Carbonate is the strongest evidence signal for this outcome.
Calcium Carbonate at 1000 mg lands inside the studied 500-1000 mg window. DoseRank scores this product's dose fit at 90 out of 100.
21st Century, Calcium Plus D3, 90 Tablets works out at $0.07 per serving. $0.07 per serving — mid price tier for this outcome. The cheapest ranked pick here is $0.03 per serving.
No. Retailer links may be affiliate links, but rankings and placement are never paid. Every product is scored by the same public model, and the ranking is recomputed from the underlying product data rather than edited by hand.
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