BIBC 120 Lecture Notes - Lecture 2: Dietary Reference Intake, Nutrient, Calorie
24 May 2018
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BIBC 120 Week 1 Lecture 2 Notes (1/10/17):
Nutritional science definitions
Dietary Reference Intakes and food labels
Assessing nutritional claims
Dietary Reference Intake (DRI) Standards
- Will have EAR/RDA or AI (not both); bracketed for gender, pregnancy
- Estimated Average Requirement (EAR): likelihood that intake is adequate in a
population
o Based on extensive research
o If every person in the population consumed this amount, 50% of them would be
getting enough to meet their nutrient requirements
- Recommended Dietary allowance (RDA): goal to to help ensure adequate intake in
an individual
o Based on adequate research (Statistically determined from EAR)
o If every person in the population consumed this amount, 97% of them would get
enough to meet their requirements
- Adequate Intake (AI): Likelihood that intake is adequate when no RDA is set for a
nutrient
o Evidence still not complete
- Tolerable Upper Intake Level (UL): Likelihood of excess or toxicity
o typically only for vitamins and minerals
Other Dietary Reference Standards:
- Estimated Energy Requirement (EER):
o kcal that should be consumed per day
- Acceptable Macronutrient Distribution Range (AMDR)
o (For adults) percent of total kcal (EER) that should be:
▪ carbohydrates: 45 – 65%
▪ protein: 10 – 35%
▪ fats: 20 – 35%
DRI TIMELINE
1) 1943: NAS (National Academy of Sciences) publishes 1st RDA values
- In US, undernutrition is a bigger problem
2) 1956: USDA (US Dept of Agriculture) puts out 4 basic food groups (carbs, vegetables,
protein, fats)
- (starting from mid 1) and 2)) mortality rates for infectious diseases drop but rates of
obesity and heart diseases and diabetes increase
3) 1990: FDA mandates labeling of all packaged foods
4) 1994: NAS publishes modern DRI values
5) 2010: Updated U“DA dietary recoedatios My Plate
Food Labels
FDA: Food and Drug Administration (enforces laws passed by Congress)
- Amount and origin of product
- Ingredients
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Bibc 120 week 1 lecture 2 notes (1/10/17): Will have ear/rda or ai (not both); bracketed for gender, pregnancy. Estimated average requirement (ear): likelihood that intake is adequate in a population: based on extensive research. If every person in the population consumed this amount, 50% of them would be getting enough to meet their nutrient requirements. Recommended dietary allowance (rda): goal to to help ensure adequate intake in an individual: based on adequate research (statistically determined from ear) If every person in the population consumed this amount, 97% of them would get enough to meet their requirements. Adequate intake (ai): likelihood that intake is adequate when no rda is set for a nutrient: evidence still not complete. Tolerable upper intake level (ul): likelihood of excess or toxicity: typically only for vitamins and minerals. Estimated energy requirement (eer): kcal that should be consumed per day.
