Calcium
Strong evidenceAlso known as: calcium carbonate, calcium citrate
The most abundant mineral in the body. Citrate absorbs without stomach acid; carbonate needs food.
What it is used for
Is needed for the maintenance of normal bones and teeth.
Dosage
Split the dose: above 500 mg at once absorbs less well.
Safety notes
May reduce absorption of iron and some antibiotics; separate doses by a few hours.