Calcium is a mineral found in many foods, and is essential for forming and maintaining healthy bones and teeth including hydroxyapatite, the primary calcium phosphate mineral in bone and enamel. Dietary calcium is absorbed from the intestine into the blood, from human or animal milk and dairy products (e.g., cheese, yogurt), or foods fortified with calcium (in accord with eCFR §104.20). The 2015-2020 Dietary Guidelines for Americans recommend 700 mg of calcium per day as the recommended dietary allowance (RDA) for children aged 1-3 years, and 1000 mg of calcium per day for children aged 4-8 years.
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