Recommended Dietary Allowance (RDA) for calcium for adults over 70 is:

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The RDA for calcium increases from 1000 to 1200 mg/day for adults over 70 years old. Option A (600 mg/day) is too low for this age group, while option B (800 mg/day) is still below the recommended amount. Option D (1500 mg/day) is too high and may increase the risk of kidney stones, cardiovascular disease and other health issues. Therefore, option C (1200 mg/day) is the best choice for adults over 70 years old to meet their calcium needs. The recommended dietary allowance for calcium increases as we age, and for adults over 70 years of age, the RDA is 1200 mg/day. This is because older adults are at an increased risk of osteoporosis, and adequate calcium intake can help maintain bone health. Choosing option C (1200 mg/day) is the best choice.

Recommended Dietary Allowance (RDA) for Calcium for Adults Over 70