NUTR 120 Lecture 1: Nutrition 120 Lecture Notes - Until Midterm 1
Document Summary
In light of the foods that we eat. In terms of nutrients: food guide has evolved over time. 4 sets of values: ear (estimated average requirements) amount of a nutrient that is estimated to meet the requirements of 50% of the people in the same-sex and life-stage groups. Set by scientists after establishing a measurable marker of adequacy, based on nutrients and their functions. Tested through the depletion-repletion experiment, detecting nutrient level in blood over time: rda (recommended dietary allowance) set by adding a safety factor to the. Ear, so that about 98% of the population meets nutrient requirements: ai (adequate intake) whe(cid:374) (cid:455)ou do(cid:374)"t ha(cid:448)e ear a(cid:374)d (cid:272)a(cid:374)(cid:374)ot set rda, use ai. There is also the food frequency questionnaire, looking into how often certain foods are consumed. I(cid:373)(cid:373)u(cid:374)e (cid:272)ells reside o(cid:374) the (cid:373)u(cid:272)osal (cid:272)ells" surfa(cid:272)e a(cid:374)d detect antigens: chyme leave the stomach in 2-6 hours, while transit time is around 24 hours.
