Also known as: Caltrate, Tums
Common, economical calcium form with highest elemental calcium percentage. Requires stomach acid for absorption.
Safe long-term
Take with food for absorption
We haven’t curated landmark studies for Calcium Carbonateyet — one-click into the primary literature here. PubMed (RCTs) is usually the highest-signal starting point.
Economical calcium source
Consult healthcare provider
Same cautions
Other ingredients in the Mineral category.
Formulate Research Team. (2026, September). Calcium Carbonate — Evidence-Based Supplement Guide. Formulate Supplement Encyclopedia. https://app.formulate-health.app/learning/supplements/calcium-carbonate
Educational content based on published research and our scoring methodology. Not medical advice — consult a qualified healthcare provider before starting, stopping, or changing supplements, especially if you take medications, are pregnant, or have a medical condition.