Lecture 10: The NRV's Flashcards
What is EAR?
A daily nutrient level estimated to meet the requirements of half the healthy individuals of a particular life stage and gender group
What is RDI, RDA?
The average daily dietary intake level that is sufficient to meet the nutrient requirements of nearly all (97-98%) healthy individuals in a particular life stage and gender group
What is AI?
The average daily nutrient intake level based on observed or experimentally determined approximations or estimates of nutrient intake by a group (or groups) of apparently healthy people that are assumed to be adequate
What is UL?
The highest average daily nutrient intake level likely to pose no adverse health effects on almost all individuals in the general population. As intake increases above the UL, the potential risk of adverse effects increases
What are other terms for dietary values?
- Acceptable Macronutrient Distribution range
- Suggested Dietary Target (SDT)
- Estimated Energy Requirement (EER)
What terms does Europe use?
Dietary Reference Values (DRVS)
What terms do the US and Canada use?
Dietary Reference Intakes (DRIs)
What terms do Australia and NZ use?
Nutrient Reference Values (NRV’s)
What are applications of NRV’s?
- Assessment and surveillance
- Planning diets
- Inform policy
- Education
- Food labeling and marketing
- Emergency food aid
What is physiological requirement?
The quantity of a nutrient needed by the body to maintain a particular level of function
What are the different ways to define adequacy?
- No deficiency
- Good stores
- Prevention of cancer?
What are physiological requirements influenced by?
- Physiological factors
- Lifestyle factors
- Biological and genetic factors
- Environmental factors
How do we establish the EAR?
- Determine distribution of physiological requirements for nutrient
- Determine average physiological requirement
- Determine variation in physiological reqs
- Adjust for inefficient use of consumed nutrient
What is a UL ideally based on?
- NOAEL (no-observed-adverse-effect-level)
or if no NOEL then based on LOAEL (lowest-observed-adverse-effect-level) and Uncertainty factor (UF)
When is a larger Uncertainty Factor (UF) applied?
- to animal data
- when over-consumption has serious effects
