Calcium Carbonate
Mineral
Also known as: Caltrate, Tums
A
Grade A💊 500-1000 mg daily🎯 2 primary uses🔗 2 synergies⚠️ Review warnings
Overview
Common, economical calcium form with highest elemental calcium percentage. Requires stomach acid for absorption.
Primary Uses
Bone healthCalcium supplementation
Dosage
Typical range
500-1000 mg daily
Timing
With meals
With food
Yes, needs acid
Duration
Safe long-term
Special Populations
Take with food for absorption
Mechanism of Action
- • Highest elemental calcium %
- • Requires stomach acid
- • Also an antacid
Evidence Quality
Evidence Grade A
Economical calcium source
Safety & Contraindications
Serious Warnings
- • Same as citrate
Contraindications
- • Same as citrate
Common Side Effects
- • Constipation
- • Gas
Pregnancy & Breastfeeding
Consult healthcare provider
Liver & Kidney Notes
Same cautions
Interactions
💊 Medications
- • Same as citrate
🧪 Supplements
- • Same as citrate
🍽️ Food & Alcohol
- • Take with food
Stacking & Synergies
Pairs Well With
D3K2
Avoid Combining With
IronZinc same time
Best Goal Synergies
Bone health
Buying Guide
What to Look For
- • Take with food
Standardization Markers
Elemental calcium
Adulteration risk
Low
Practical Notes
- • Must take with food
- • Citrate better if on PPIs
Tags
mineralbone health
Frequently Asked About Calcium Carbonate
How much Calcium Carbonate should I take?
The typical effective range is 500-1000 mg daily. Individual needs vary based on age, body weight, diet, and goals — start at the lower end and adjust based on response. Always consult a healthcare provider before starting a new supplement.
When is the best time to take Calcium Carbonate?
With meals. Consistency matters more than perfect timing — pick a daily anchor (e.g. with breakfast or before bed) and stick with it.
Should I take Calcium Carbonate with food?
Yes, needs acid.
Does Calcium Carbonate interact with medications?
Yes — known interactions include Same as citrate. If you take any prescription medication, talk to your doctor or pharmacist before starting Calcium Carbonate.
What does Calcium Carbonate pair well with?
Calcium Carbonate stacks well with D3 and K2 — these combinations either improve absorption or work synergistically toward common goals.
Who should not take Calcium Carbonate?
Calcium Carbonate should be avoided or used with caution by people with Same as citrate. Pregnant or breastfeeding women should consult a healthcare provider before use.
What are the side effects of Calcium Carbonate?
Most people tolerate Calcium Carbonate well. The most commonly reported side effects are Constipation and Gas. Side effects are usually dose-dependent — lowering the dose often resolves them.
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.