Minerals

Calcium-magnesium-zinc

Also called: cal mag zinc, calcium magnesium zinc

A combination tablet of three minerals.

Why people take it
Bones, muscles, sleep.
What the evidence says
Useful only if your diet is short of them.
How it is usually taken
Usually one to three tablets a day with meals; check the total calcium from all sources.
Be careful
Calcium blocks absorption of iron, thyroid medicine and some antibiotics; take them hours apart.
Medicines it can interact with
Reduces absorption of levothyroxine, iron, bisphosphonates, quinolone and tetracycline antibiotics; separate by 2 to 4 hours.

Other minerals

SeleniumIodineChromiumCopperManganeseBoronSilicaPhosphorusSodium bicarbonateLithium orotateStrontiumShilajitFulvic acid

Common questions

What is Calcium-magnesium-zinc?

A combination tablet of three minerals.

Why do people take Calcium-magnesium-zinc?

Bones, muscles, sleep.

Does Calcium-magnesium-zinc work?

Useful only if your diet is short of them.

How much Calcium-magnesium-zinc do people take?

Usually one to three tablets a day with meals; check the total calcium from all sources.

Is Calcium-magnesium-zinc safe?

Calcium blocks absorption of iron, thyroid medicine and some antibiotics; take them hours apart.

Does Calcium-magnesium-zinc interact with medicines?

Reduces absorption of levothyroxine, iron, bisphosphonates, quinolone and tetracycline antibiotics; separate by 2 to 4 hours.

Sources and further reading

Last reviewed 31 October 2026. Written by Satya Babu.

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For information only, not medical advice. Supplements are not medicines: they are not tested and approved like drugs before they are sold, and they can interact with medicines. Talk to your doctor or pharmacist before you start one, especially if you are pregnant or breastfeeding, take regular medicines, or have kidney, liver or heart disease.