DRI- 1 Flashcards
DRI came after
old RDA (which made ppl think needed to be met every day- took too literally) and RNI’s
Dietary reference intakes include
EAR, RDA, AI, UL
RDA (recommenced dietary allowance)
exceeds the requirement for nearly all the members
RDA must account for
individual variability in a population, bioavailability, sex and age, physiological state
UL
upper intake level
EAR
estimated average requirement
- meet half of healthy individuals in life stage and gender group
-
RDA
recommended dietary allowance
- EAR + 2 SD
- if no S.D than EAR (1.2)
- for individuals after diet is assessed over time
new consideration for RDA
to prevent chronic diseases
what are RDA not intended for
to overcome deficiencies or recover from illness
recommendations are set for?
deficiency disease prevention and chronic disease prevention
what are beginning to be considered for disease prevention
non-essential food components
criteria of adequacy
biomarkers of exposure, mechanisms or functional outcomes, effect and clinical outcome
biomarkers of exposure
blood levels, balance studies
biomarkers of factional outcome
enzyme saturationor activity
biomarkers of effect
efficacy outcome (LDL levels, bone mineral density)
RDA allow an estimate of?
the risk of deficiency for an individual if the diet is assessed over time
- must also include ABCD and F
- could not just diagnose a deficiency my seeing someone eat below the RDA
when would a deficiency be seen fastest?
with high turnover and small pool size ( B2- 3 days)
why can’t we compare the group mean intake with the EAR?
bc even though the same mean, could have higher variance and therefore have a greater prevalence of inadequecy
If 2.5 % of the mean population intake is below the EAR, what is the estimated prevalence of deficient intakes?
1% have risk of deficiency as some people will not be at risk bc some will not be deficient consuming the nutrient at below the EAR
