Lecture 22

Question 1

What are the 2 natural forms of Vit K?

Answer 1

1. Vit K1
   - major dietary form
   - found in green plants
   - electron acceptor in photosynthesis
2. Vit K2
   - produced by intestinal bacteria
   - same structure as K1 but has double bonds

Question 2

What is Vit K3?

Answer 2

A provitamin synthetic form

Question 3

Where is Vit K sourced from?

Answer 3

• 50% from bacteria in large bowel

- Green leafy vege

Question 4

What is the main function of Vit K?

Answer 4

Role in blood clotting

Question 5

Describe Vit K deficiency and toxicity

Answer 5

• Deficiency from the diet is rare
• > secondary deficiency = occurs when there’s an inflammation in the gut e.g. Chrons

-Toxicity is rare

Question 6

How many fat soluble molecules doe Vit E represent?

Answer 6

8

Question 7

How is our Vit E intake?

Answer 7

Good

Question 8

What food sources do we get Vit E from?

Answer 8

• Polyunsaturated plant oils is the best
• Butter/marge
• Dark green leafy vege

Question 9

What is Vit E easily destroyed by?

Answer 9

Heat and oxygen

Question 10

What are the functions of Vit E?

Answer 10

• Fat soluble antioxidant
• Stabilises cell membrane
• Protects plasma lipoproteins from oxidative damage

Question 11

Describe VIt E deficiency and toxicity

Answer 11

Both rare, Vit E is the least toxic fat-soluble Vit

Question 12

What do studies show an inverse association between?

Answer 12

Between fruit/vege intake and cancer