In my readings, I have found that most nutritionists do not like the RDA. Most of their reasons sound valid. After all, people are different in height and weight. I've heard that the RDA is based on a male that is 5'11" and 150 pounds, and a female that is 5'3" and 120 pounds, but I can't substantiate that. I tried reading the Surgeon General's Report but got hopelessly lost. All I know is that while the government is apparently taking a stab at naming a value that people need, most nutritionists consider the RDA to be way too low for most people. In most cases, nutritionists conclude that the RDA is really the absolute minimum that people should consume.
On my pages of vitamins and minerals, I have listed the RDA whenever I could find one. I feel that even though it may not be completely valid for every person, it is at least a starting point. I also have made sure to list values that nutritionists have given as a necessary amount as well as a maximum.
Below is a chart that gives the current standards.
Vitamin ARetinal equivalents in milligrams.
|Lactating Women||1st 6 months||1300||400||18|
|2nd 6 months||1200||400||16|
Vitamin C(ascorbic acid) (mg)
|Lactating Women||1st 6 months||1.6||1.8||20||2.1||2.6||280||95|
|2nd 6 months||1.6||1.7||20||2.1||2.6||260||90|
|Lactating Women||1st 6 months||1200||1200||200||15||355||19|
|2nd 6 months||1200||1200||200||15||340||16|
*These vitamins and minerals are the amounts that should be present in a variety of common foods, which will also contain other nutrients, the requirement of which are less well defined. The amounts given allow for variation between individuals and ordinary environmental stresses.
SOURCE: Table is modified from the National Academy of Sciences Food and Nutrition Board, Recommended Daily allowances, 10th ed. (Washington, D.C., National Academy Press, 1989).