CHEM 101B Lecture Notes - Lecture 8: Vitamin K, B Vitamins, Vitamin A
8 Jun 2016
School
Department
Course
Professor
Nutrition Chapter 8 Study Guide
Introducing Vitamins
Vitamin: an organic micronutrient
Functions of vitamins:
oRegulate processes in the body
oOccurs naturally in commonly eaten foods
oPrevents specific deficiency disorder when not consumed enough
Two categories:
oFat-soluble (A, D, E, and K)
oWater-soluble (others)
Vitamin Digestion and Absorption
Aren’t digested, but are absorbed in the small intestine
oMore vitamins are absorbed according to your needs
Retaining the Vitamin content of foods
oPurchase fresh produce
oEat when they are fresh
oMicrowave, steam, or stir-fry
oDon’t overcook
oAdd fat after they are cooked
oStore canned foods in a cool place
General Roles of Vitamins
Don’t give you energy, but certain B vitamins can help release energy from energy cells
Antioxidant: protect cells by giving up electrons to free radicals
Fat-soluble vitamins
Vitamin A
A family of compounds that includes retinol, which may be called preformed vitamin A
Carotenoids: yellow-orange pigments in plants
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Functions of vitamins: regulate processes in the body, occurs naturally in commonly eaten foods o. Prevents specific deficiency disorder when not consumed enough. Fat-soluble (a, d, e, and k: water-soluble (others) Aren"t digested, but are absorbed in the small intestine: more vitamins are absorbed according to your needs. Purchase fresh produce: eat when they are fresh, microwave, steam, or stir-fry, don"t overcook, add fat after they are cooked o. Don"t give you energy, but certain b vitamins can help release energy from energy cells. Antioxidant: protect cells by giving up electrons to free radicals. A family of compounds that includes retinol, which may be called preformed vitamin a. Beta-carotene: a carotenoid that the body can convert into retinol. Functions of vitamin a: vision, cell production, growth, and development, building strong bones, regulating immune system activity, and maintaining epithelial cells. Preformed vitamin a: liver, butter, fish, fish oils, and eggs.
