Calcium

Ca 🟢 Strong

The key mineral for bones and teeth; especially important for postmenopausal women.

⚠ Split dosesSee cautions below; consult your physician for specifics.⚠ CVD debate (excess)See cautions below; consult your physician for specifics.

Reviewed by Dr. Sungwoong Jung · Last reviewed Jul 16, 2026

Key benefits

Bone/teeth mineralization

Muscle, nerve, clotting

Fracture prevention with vitamin D

How it works

Evidence

🟢 StrongFracture prevention combined with vitamin D

🟡 Moderate / mixedExcess raises cardiovascular debate

The same nutrient can differ for "correcting deficiency" vs "general prevention."

Suggested use

Split into ≤500mg doses, with vitamin D.

A general suggestion, not a prescription.

Cautions & interactions

Blocks thyroid meds/antibiotics; avoid excess.

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Korea vs USA

🇰🇷 Korea

Calcium+D combos

🇺🇸 USA

citrate/carbonate

References

NIH ODS — Calcium ↗

Grades/refs re-verified at each update (draft).

Vitamin D Vitamin D A fat-soluble vitamin central to bone and immune health; deficiency is common in people who stay indoors. 🟢 Strong Foundational·Immune Vitamin K2 Vitamin K2 A fat-soluble vitamin that helps direct calcium into bone. 🟡 Moderate Bone·Joint Magnesium Magnesium An essential mineral for muscle, nerve, and sleep; forms differ in absorption and use. 🟡 Moderate Muscle·Nerve

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Disclaimer — This content is for general information and suggestion only and does not replace medical diagnosis or treatment. Consult a doctor or pharmacist if you have a condition or take medication.