The difference between all the calciums.

Let’s start by talking about elemental calcium (the calcium that’s available to be absorbed). Elemental calcium is the actual amount of calcium in a tablet. For example, Calcium citrate has ~20% elemental calcium, which would mean that 1,000 mg of calcium citrate has 200 mg of elemental calcium.

The recommended daily allowance of calcium for adults is 1,000 mg, and 1.200 mg for adults over 50.

Here’s the elemental calcium breakdown:

GenericBrandElemental
calcium carbonateViactiv, Tums,Os-Cal40%
Calcium citrateCitracal~20%(take with food)
OystershellThis is mainly ca carbonatevaries, may contain a lot of lead. not recommended.
Calcium phosphatePosture-D~40%

PharmacistNote* Some antibiotics ( quinolones(such as levaquin,cipro…) and tetracyclines(such as minocycline, doxycycline..) may have a decreased absorption rate with calcium. Space apart by 4 hours.

Space apart from alendronate for the same reason…

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