Calcium Carbonate

A common calcium supplement and antacid used to support bone health and neutralize stomach acid.

What is Calcium Carbonate?

Calcium carbonate is an inorganic calcium salt widely used as a dietary calcium supplement and as an antacid for relief from acidity.

It is one of the most common forms of calcium found in nature.

History & Background

Calcium carbonate has been used since ancient times, sourced from limestone, marble, and shells for medicinal and nutritional purposes.

Chemical Structure & Properties

• Chemical formula: CaCO₃
• Molar mass: 100.09 g/mol
• Nature: White, insoluble powder
• Source: Limestone, chalk, marble

Mechanism of Action

Calcium carbonate works by:

• Providing elemental calcium for bone mineralization
• Neutralizing gastric acid by forming calcium chloride
• Reducing symptoms of acid indigestion

Health Benefits & Uses

• Prevention and treatment of calcium deficiency
• Bone and teeth strengthening
• Antacid for acidity and heartburn
• Adjunct in osteoporosis management

Dosage Guidelines

Adults: 500–1000 mg elemental calcium/day

Best taken: With meals for better absorption

⚠️ Do not exceed recommended dose to avoid kidney stones.

Calcium Deficiency

• Osteoporosis
• Muscle cramps
• Brittle nails
• Bone pain

Side Effects

• Constipation
• Bloating
• Hypercalcemia (overdose)

Frequently Asked Questions

Is calcium carbonate an antacid? – Yes.

Is it better than calcium citrate? – Depends on stomach acid.

Should it be taken with food? – Yes.

Is it safe long-term? – Yes, within limits.

⚠️ Educational content only. Not a substitute for professional medical advice.