Fat soluble vitamins and health - Introduction to the vitamins and dietary reference intake

12 important questions on Fat soluble vitamins and health - Introduction to the vitamins and dietary reference intake

What is the Diatary Reference Intake based on?

are based on scientifically grounded relationships between nutrient intakes and indicators of adequacy, as well as the prevention of chronic diseases in apparently healthy populations

What is the defenition of the Estimated average requirement (EAR)?

A daily nutrient intake value that is estimated to meet the requirement of half of the healthy individuals in an age and gender-specific group. Used to determine dietary adequacy of populations but not for individuals.

What is the downside of estimated average requirements (EAR)?

The downside is that it is based on the population, not on the individual. (gender, age)
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What is the defenition of the recommended dietary allowance (RDA)?

The average daily dietary intake level that is sufficient to meet the nutrient requirement of nearly all (97-98%) healthy individuals in an age and gender-specific group.

Why do we use the recommended dietary allowance (RDA)?

We use it because it gives the the right amount for a lot of people. Eating a little bit to much of a compounds is not as bad as eating to little.

How do you calculate the recommended dietary allowances (RDA)?


SD: standard deviation (12%)
EAR: 75%

If you have 76 unites
You do:
76*0.75 = 57
76*0.12 = 9.2
57+2*9.2 = 75.4

What is the defenition of the adequate Intake (AI)?

A recommended intake value based on observed or experimentally determined approximations or estimates of nutrient intake by a group (or groups) of healthy people that are assumed to be adequate - used when an RDA cannot be determined.

What it the difference between recommended diary allowance (RDA) and adequate intake (AI)?

The RDA is based on enough scientific evidence to expect that the need of nearly all healthy people are met.
The AI mus rely more on scientific judgement because there is not enough evidence.

What is the defenition of the tolerable upper intake level (UL)?

The highest level of daily nutrient intake that is likely to pose no risk of adverse health effects for almost all individuals in the general population. As intake increases above the UL, the potential risk of adverse effects increases.

Why are there differences between countries and councils?

  1. Differences in environmental factors
  2. Differences in diet composition (iron and zinc absorption)
  3. Differences in the criteria of nutritional adequacy
  4. Looking at different studies

Is the RDA the same of different for sick people?

It should be different because the RDA is based on healthy people. However it is used for sick people because there is no better information available

What is the daily value (DV)?

The amount of a component you should eat every day. Not always the smame as the RDA or AI.
It is one value for every person, can be put on labels.

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