Chelated minerals are better absorbed.

  Minerals need stomach acid to dissolve the minerals into a form that can be absorbed.

  "Chelated" means the minerals are attached to an organic acid such as citrate, malate, aspartate, gluconate, lactate, etc. These organic salts are generally more soluble and don't depend as much on gastric acidity for absorption.

  For example, calcium citrate is significantly more soluble than calcium carbonate and may be preferred in patients with low gastric acidity...the elderly or patients taking acid-blocking drugs.

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