Vitamin E Flashcards
Vitamin E name
Tocopherols
Who observed that on certain purified diets rats grew but did not reproduce?
Mattill
Who suggested a vitamin was the essential dietary factor?
Evans
Who coined the name Vitamin E?
Sure
What is the most active form of vit. E?
alpha tocopherols
What are the multiple forms of tocopherols?
alpha, beta, y, S
Is vitamin E fat soluble or water soluble?
fat soluble
-unsaponifiable
-heat stable
Vitamin E is the easiest vitamin to ________
oxidize
Why is vit. E called the antisterility vitamin?
-causes death and reabsorption in females
-causes degenerative changes in testes, irreversible sterility in males (Vit. A sterility is reversible)
Vitamin E is a natural ________
antioxidant (saves vit. A, etc.)
Muscular dystrophy caused by vitamin E deficiency symptoms:
-weakness, paraylsis, degeneration, creatine excretion increase
-stiff lamb disease in sheep
-white-muscle disease in cows
What does vitamin E deficiency in dairy cows cause?
heart muscle damage
What does vitamin E deficiency in chicks cause?
-nutritional encephalomalacia
(“crazy chick disease”)
-Executive diathesis
Nutritional encephalomalacia symptoms
uncoordinated gait, prostration, brain lesions
Exudative diathesis symptoms
-a hemorrhagic disease of chicks
-also responds to Se treatment
-severe edema
What does vitamin E deficiency cause in turkeys?
gizzard erosion (breakdown of smooth muscle)
Functions of vitamin E are closely related to what mineral?
Selenium
Antioxidant properties of vit. E
-protects certain dietary constituents from oxidative destruction such as carotene in intestines
-prevents formation of peroxides from the unsaturated fatty acids in body tissues (would destroy structural integrity of cells)
What fats are easily destroyed?
rancid fats
Tocopherols are resistant to _____ but easily _______
heat; oxidized
Where can the body store vit. E?
liver
