Your "Personal Daily Allowance" of a nutrient is Diet Power's umbrella term for the amount thought to be right for you, personally. (Don't confuse it with the Daily Value cited on food labels. Daily Values aren't adjusted to you individually; they're for an average person on a 2000-calorie diet, as the labels explain.) Your Personal Daily Allowance is always equal to one of the following:
Food and Nutrition Board's (FNB's) Recommended Dietary Allowance (RDA), which depends on your age, sex, and whether you are
pregnant or lactating. (For several nutrients, it also depends on your
body weight or whether you smoke.) The nutrients in Diet Power that have RDAs are copper, dietary
fiber, folate, iron,
magnesium, niacin, phosphorus, protein, riboflavin, selenium, thiamin, vitamin A, vitamin
B12, vitamin C, vitamin E, and zinc. (Diet Power does not use the RDA for
protein as your PDA, however¾see paragraph 3, below).
The FNB's Adequate Intake (AI). This figure is for nutrients that don't have an RDA
because not enough is known about them. For such nutrients, the FNB doesn't
recommend a particular intake, but it does recognize an intake that appears
to sustain good health. Diet Power uses the AI in setting the PDA for
six nutrients: calcium, manganese, potassium, sodium,
vitamin D, and water.
Power's Daily Allowance (DPDA). This applies to ten items¾alcohol, calories, cholesterol, monounsaturated
fat, sugars, total carbohydrate, total fat and trans fat¾that have no RDA or AI, and to protein. For these nine nutrients, Diet Power has established
its own daily allowance through review of scientific literature. No one
can say with 100-percent certainty that the DPDA is correct for you, but
the best evidence shows it is probably
safe for the average person of your age, sex, and size.
Your own handmade PDA. For any nutrient, you can customize your daily allowance instead of using Diet Power's. (Diet Power cannot endorse the new value, of course, since we have no control over it.) See Personal Daily Allowances, Editing Your.
To learn the default PDA of any nutrient, click its name above or on the list in Nutrients, Information on.
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Last Modified: 7/1/07