How much vitamins do I need?

The ' recommended daily allowance (RDA) "may vary by age group and by gender.
The RDA covers the average need of the English population, with still a wide margin to take account of the distribution of the need in the population. According to the definition would the RDA the need of 97.5% of the population have to cover. 2.5% of the population has so need more than the RDA, but on the other hand, most of the population to less even though sufficient.

If someone structural (more than a few weeks) ingest less than the RDA vitamins, does not automatically mean that there is a deficit. Chances are that this person is in the 97.5% of the population under less even though sufficient. Therefore, never be shown without a deficit in the body to measure how much of a vitamin is available to the normal functions of the organs and tissues to take place. Such a study is vitamin status search.

Sometimes is not the Adequate Intake (AI), but the RDA. The AI is a level of intake that is sufficient for (almost) the entire population. There is insufficient information available to determine the average need.

In this chapter stand for different population groups in Netherlands (children, adults, seniors and other population groups) the Rdas per vitamin and mineral. In addition to a number of groups given an explanation when supplements are desired and why.