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Calcium

minerals

Calcium is an essential mineral critical for bone and teeth health, muscle function, and nerve transmission. It plays a vital role in maintaining structural integrity and supporting numerous physiological processes throughout the body.

Benefits

Bone strength and density
Teeth health and enamel protection
Muscle contraction and function
Nerve signal transmission
Heart rhythm regulation
Blood clotting

Dosage

Typical Dose

800-1000 mg daily

Upper Limit

2500 mg daily

Timing

With meals to enhance absorption; split doses are more effective

Forms & Bioavailability

Calcium Citrate

High absorption (21-27%), effective on empty stomach, better for those with low stomach acid

Calcium Carbonate

Moderate absorption (22-25%), requires stomach acid, inexpensive and widely available

Calcium Malate

Good absorption, particularly beneficial for muscle and energy support

Calcium Glycinate

High absorption, well-tolerated, minimal gastrointestinal side effects

Side Effects

Constipation
Bloating and gas
Nausea
Milk-alkali syndrome with excessive intake
Kidney stone formation in susceptible individuals

Interactions

Reduces absorption of tetracycline and fluoroquinolone antibiotics
Interferes with bisphosphonate absorption
May reduce iron and zinc bioavailability
Can decrease levothyroxine effectiveness
May interact with thiazide diuretics

Research Summary

Extensive research demonstrates calcium's essential role in maintaining bone mineral density and reducing osteoporosis risk, particularly in post-menopausal women and older adults. Studies support its effectiveness for muscle function and cardiovascular health, though optimal intake and source vary by individual factors including age, sex, and dietary patterns. Recent evidence suggests adequate calcium intake may support metabolic health and weight management.

Where to Buy Calcium

We recommend buying from reputable retailers. Check reviews and third-party testing.

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Disclaimer: This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement, especially if you have existing health conditions or take medication.