3.2.1%20vitamin%20a-r - converted to vitamin A...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
3.2.1. Fat Soluble Vitamins:  Vitamin A
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
General Characteristics Vitamins in  Food Easily destroyed by heat/light  except for vitamin D Absorption Packaged with other lipids into  chylomicrons Circulation Into lymph system first then to the  bloodstream Excretion Tend to remain in liver and adipose  tissue  Toxicity  Toxic levels may be reached with  vitamin supplements Function Various physiological functions in  the body
Background image of page 2
 3 active forms:  *retinol  (reproduction; bones)  *retinal (vision) *retinoic acid  (regulates growth)   retinol retinal retinoic  acid Vitamin A – the Retinoids
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Carotenoids   some, e.g.  β -carotene can be converted  to vitamin A  some, e.g. lycopene and lutein cannot be 
Background image of page 4
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: converted to vitamin A (phytochemicals) Sources of Vitamin A • Animal: liver, milk, herring • Plant (carotenoids): red/ yellow/ orange fruits & vegetables; dark green leafy vegetables Vitamin A and Vision Fig 11.3 Vitamin A and Vision Fig 11.3 Other functions of Vitamin A • cell differentiation epithelial cells • immune system antioxidant • reproduction sperm development fetal development • growth bone growth Deficiency: • affects eyes • epithelial tissues • immune system Toxicity: • birth defects • liver damage • osteoporosis • hypercarotenemia...
View Full Document

This note was uploaded on 06/24/2008 for the course FSHN 130 taught by Professor Wood during the Spring '08 term at Washington State University .

Page1 / 10

3.2.1%20vitamin%20a-r - converted to vitamin A...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online