Product photo 1 of 11
Scored forOutcome alternatives
21st Century90 count • 90 servingsAvailable now$6.17$0.07 / serving4.7 · 11,015 ratings
86Category leader
#1 of 3452 ranked for gastroesophageal reflux or heartburnThis product sets the leader mark
Why this ranks #1 for gastroesophageal reflux or heartburn
Because it wins- Evidence fitCalcium Carbonate is the strongest evidence signal for this outcome.
- Dose fitCalcium Carbonate at 1000 mg lands inside the studied 500-1000 mg window.
- Price / serving$0.07 per serving — mid price tier for this outcome.
- AvailabilityIn stock across major retailers; 99% availability confidence.
- TrustStrong trust signals — consistently high marks from verified buyer ratings.
The numbers · Gastroesophageal reflux or heartburn
86
89
90
99
1000 mgIn rangeinside the studied 500-1000 mg window
20 mcg
Retailer links may be affiliate links. Rankings and placement are not paid placement.
