PHRM 221 Lecture Notes - Lecture 2: Vitamin A, Dietary Reference Intake, Chronic Toxicity
Document Summary
Vitamin and minerals : substances essential in small quantities for normal metabolic and physiological function. Either not formed at all or formed in insufficient amounts in the body. Harmonized us and canadian guidelines for recommended nutrient intakes in healthy populations. Developed by food and nutrition board of the us institute of medicine in collaboration with health canada. Evidence-based, consider maintenance of good health and prevention of chronic disease, and possible toxicity of excess intake. Dietary reference intakes developed: rda, ai, ul. Rda (recommended dietary allowances): dietary intake level sufficient to meet needs of. Calculated based on the median daily intake estimated to meet the requirement of half the healthy individuals in a group (estimated average requirement ( ear )) Ai (adequate intake): for nutrients which there isn"t enough information to calculate an rda. Based on the estimated average nutrient intake by a group(s) of healthy individuals.