DRI Flashcards
what is the set of standards for energy and nutrients in Canada? in USA?
RNI-recommended nutrients intakes
RDA- recommended dietary allowances
GOAL- prevent nutrient deficiencies
what is the FNB
food and nutrition board
what is the IOM
institute of medicine
NAS
national academy of sciences
what are the two main subcommitties on the standing committee on the scientific Evaluation of Dietary Reference Intakes
- upper reference levels…deals with toxicity and risks…what is too much… in a society with supplements
- interpretation and uses of DRIs….deals with teaching people and showing them how to use the DRIs….set out guidance documents
did the development and publication of DRIs report for individual or group nutrients
individual
who was involved in the DRI project
- Standing committee on Scientific Evaluation of Dietary Referencce Intakes (and subcommittees)
- expert nutrient reiew pannels
- organizations: FNB of the IOM and part of the NAS
health canada
what do DRIs consist of?
four reference values:
EAR
RDA
AI
UL
these are estimates bc you cant be 100% sure
are DRIs quantitative or qualitative estimates of nutrient intakes
quantitative
**what are the goals of DRIs
-prevent deficiency and optimize health
DRIs are used for ______ and _____ diets of ______people
planning
assessing
healthy
DRIs can look at preventing deficiency and _____disease
chronic
why would we change DRIs
- expand knowledge WRT preventing chronic disease
- extend goal of recommendations beyond preventing deficiencies
- harmonize Canada and USA
how much of the nutrient is needed depends on what you consider adequate….
what is the criteria?
may differ depending on nutrient, and life-stage group
list the potential criteria of Vit C adequacy
- prevent scurvy
- saturate tissues (allows us to optimize Vit C status levels)
- maximize absorption of non-heme iron
- reduce risk of gastric cancer
What is EAR
estimated Average Requirement
a daily nutrient intake value that is estimated to meet the requirement of HALF of the healthy individuals in a particular life stage and gender group
usually the answer to a question is EAR
what is EAR used for ?
planning…..how much a group should consume
assessment …. adequacy intake of an individual or group
what is the RDA
recommended dietary allowance
avg, daily dietary intake level that is sufficient to meet the nutrient req. of nearly all (97-98%) of healthy individuals in a particular life stage and gender group
the RDA is the EAR plus ______
two standard deviations
what is the RDA used for
planning for individuals
only use for assessment IF long term usual intake is known
what is a type 1 and type 2 error
type 1: reject null, but the null is true
type 2: do not reject null but the null was false
what is AI
Adequate intake
recommended daily intake values based on observed or experimentally determined approximations of nutrient intake by a group (or groups) of healthy people
used when EAR and RDA cannot be determined
how is the AI obtained
from data that shows a mean intake that appears to sustain a desired indicator (eg Ca retention in bone)
what is aI used for
planning for individuals when RDA does not exist
assessment :
for individuals when EAR/RDA does not exist
for groups when EAR does not exist
what is UL
tolerable Upper intake level
the highest level of daily nutrient intake that is likely to pose no risk of adverse health effects to almost all individuals in the general population
as intake increases about the UL, the risk of adverse effects increases
how much your body can tolerate
some nutrients dont have UL bc it hasnt been figured out
what is the purpose of UL
guards against over consumption
it is NOT a recommended level of intake
what can UL be used for
planning and assessment
DRIs vary by _____________
Life stage group
infants are usually assigned an AI….where does this number come from?
comes from the amount of breast milk an infant would consume per day
do DRIs account for variation is individual differences?
yes
T/F?
the estimates for DRIs is based on average/usual daily intakes and accounts for variability
true
What was important about DRI Report #5 in 2000?
- applications in dietary assessment
- key guide to actually using the DRIs
- individuals vs groups
implementation of DRIs in Canada
- HC assembles expert advisory panels
- review DRIs and identify public health implications for Canada
- Public policy
- Public education
- public programs
-link between DRI and Canada’s dietary guidelines (Canada food guise, food labels, food fortification policy)
