The Recommended Dietary Allowances (RDA) were first introduced in 1941 by the U.S. National Academy of Sciences to address malnutrition during World War II. Initially, these guidelines aimed to establish nutrient levels that would prevent deficiencies such as rickets and scurvy. Over time, the scope of RDA has expanded beyond deficiency prevention to include broader nutritional goals, such as promoting overall health and reducing the risk of chronic diseases.
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