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Autor:  Tom
E-mail:  não-disponível
Data:  06/DEZ/2004 7:01 PM
Assunto:  I'm glad you asked
Mensagem:  I'm glad you asked about this subject. I was just trying to convince my wife that I need another pumpkin pie (both the pumpkin pie and the pecan pie from Thanksgiving have been consumed). I thought I might be able to sneak the requirement for a pie into the USRDA. Then, as I did the research, I realized that I was fighting a loosing battle. Here's some of the stuff I learned: QUOTE What Is United States Recommended Daily Allowances (USRDA)? USRDAs were devised by the Food and Drug Administration for nutritional labeling. These are the lists on processed foods and vitamin products that tell what percentage of each of 19 essential nutrients you get per serving or dose. It is a rough guide because it doesn't differentiate among people of different ages and sex who have different nutrient requirements. The USRDAs, in turn, are based on the RDAs- Recommended Dietary Allowances derived by a prestigious group of nutritional scientists who advise the Food and Nutrition Board, a committee of the National Academy of Sciences-National Research Council. Every five years or so, the board reviews and revises its recommendations. As the board defines them, the RDAs are "the levels of intake of essential nutrients considered, in the judgment of the Food and Nutrition Board on the basis of available scientific knowledge, to be adequate to meet the known nutritional needs of practically all healthy persons." Except for vitamins A and D, it's not harmful to consume two to three times the recommended levels of vitamins. Many people regularly do through the foods they eat and especially if they take a multivitamin supplement. Shortcomings of the Recommended Daily Allowances There are some caveats regarding the RDAs. The board that established them admits that scientific knowledge of nutritional requirements is far from complete: that the requirements for many nutrients have not been established; that several essential nutrients have only recently been discovered; and that in all likelihood other nutrients will be found to be essential in years to come. Therefore, to be sure that as yet undefined nutritional needs are met, it's important to eat a varied diet and not depend on pills or processed foods artificially stoked with known micronutrients. The RDAs should not be confused with nutritional requirements. Requirements differ from individual to individual because of inherent genetic differences, among other factors. Therefore, the RDAs represent estimates that exceed the requirements of most people. The RDAs were developed for healthy people under normal circumstances (i.e., no illness, no genetic weaknesses, no environmental toxin exposure) to prevent the development of overt deficiency diseases. They were not developed to serve as a guide to determining optimal nutritional needs. In addition, the studies that were used to determine the level of a nutrient sufficient to prevent a nutritional deficiency were typically conducted for six to nine months, only about 1% of the average human life span. Nutritional studies with animals have shown that the amounts of some nutrients sufficient to provide health and the prevention of a deficiency disease for short periods of time may be totally inadequate to maintain the health of the animal over its entire lifespan. END OF QUOTE Now, the above is from the very first web site I found on Google when I typed in USRDA. I couldn't cut and paste both the information and the URL. So, if you want to see the source just Google. I'm not plagerizing.....I admit the above are not my words. They point out that the RDA for me is different than for my wife. We have different metabolisms, etc. However, it's a good ballpark figure to work with if you are watching your intake and worried about vitamins, minerals and such. We worry more about fat, unsaturated fat and calories. I am convinced that a pumpkin pie is healthy. You know who says it's not the pie that's gonna kill me, it's the Chantilly that goes on top!!

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 English Made in Brazil -- English, Portuguese, & contrastive linguistics
Percentage of U.S Recommended daily allowances?  –  Marina  06/DEZ/2004, 6:14 PM
Re: Percentage of U.S Recommended daily allowan...  –  Johannes  06/DEZ/2004, 6:36 PM
Re: Percentage of U.S Recommended daily allowan...  –  Dale Thomas  06/DEZ/2004, 6:44 PM
 I'm glad you asked  –  Tom  06/DEZ/2004, 7:01 PM
Re: Percentage of U.S Recommended daily allowan...  –  Johannes  06/DEZ/2004, 7:02 PM
Re: Percentage of U.S Recommended daily allowan...  –  Dale Thomas  06/DEZ/2004, 7:31 PM

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