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What are RDAs (Recommended Dietary Allowances)?

RDAs (Recommended Dietary Allowances) are estimates for meeting the nutritional needs of a group of people. They are not averages, but are calculated for individuals with the highest dietary requirements. RDAs are intended for individuals whose physical activity is considered light and who live in temperate (neither extremely hot or cold) climates. The goal of RDAs is to provide a safety margin for each nutrient (a source of nourishment found in food), above the minimum level that will maintain health.

RDAs for the United States, formulated by the United States Food and Drug Administration, are based on tables prepared by the Food and Nutrition Board of the National Research Council. The RDAs were established primarily in connection with legal labeling requirements of foods and vitamin preparations.

Sources: Burton, Benjamin T., and Willis R....

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1. Dairy Products
   1. What is the temperature to which milk must be heated to be pasteurized?
   2. Is there a difference in nutritional value between brown-shelled eggs and white-shelled eggs?
   3. How does butter differ from margarine and oleo?
   4. How do you make clarified butter?
   5. How do the holes form in Swiss cheese?
2. Fruits And Vegetables
   1. What is the difference between a fruit and a vegetable?
   2. Is the tomato a fruit or a vegetable?
   3. What are some common varieties of apples?
   4. What is a legume?
   5. What is a star fruit?
   6. What is an ugli?
   7. Will an orange ripen after it is picked?
3. Meats And Miscellaneous Foods
   1. What are the leanest red meats?
   2. How hot must the temperature of meat be to ensure that it is safe to eat?
   3. Which fish have the most nutrients and are the least susceptible to contamination?
   4. What are sweetbreads?
   5. What is a prawn?
   6. Where did bagels originate, and why are genuine bagels boiled before baking?
   7. Where did pizza originate?
   8. How does popcorn pop?
   9. What is Indian corn?
   10. Who invented peanut butter?
   11. How is tofu made?
   12. How are truffles found?
   13. What are the different kinds of sugar?
   14. How much maple syrup does a maple tree make?
   15. What are rose hips?
   16. How is garlic used?
   17. What plant is the source for natural vanilla flavoring?
4. Nutrition
   1. What are good sources of vitamins?
   2. What are good sources of the major dietary minerals?
   3. What are RDAs (Recommended Dietary Allowances)?
   4. What is the food guide pyramid recommended by the U.S. Department of Agriculture?
   5. What is the difference between essential and nonessential amino acids?
   6. How are food calories measured?
   7. What is the difference between an herb and a spice?
   8. What is the daily recommended allowance of salt and cholesterol in the diet?
   9. Why is salt added to ice in an ice cream freezer?
   10. What terms are allowed under Food and Drug Administration rules to describe the fat content of foods?
   11. How much junk food does the average American eat in a year?
5. Beverages
   1. How many glasses of water should humans drink every day?
   2. Why does water not put out an oil fire?
   3. What is the formula for Coca-Cola™?
   4. What is the beverage known as Moxie™?
   5. What is wassail?
   6. Who drinks the most coffee in the world?
   7. How much caffeine is in coffee, tea, and cocoa?
   8. How is coffee decaffeinated?
   9. What are the ingredients in beer?
6. Food Processing
   1. Why does the smoking of meat act as a preservative?
   2. When were frozen foods first available commercially?
   3. How is food freeze-dried?
   4. What is MSG?
   5. What was the first genetically altered whole food?
   6. Why is flour bleached?