Lecture 22 Flashcards
1
Q
What are the 2 natural forms of Vit K?
A
- Vit K1
- major dietary form
- found in green plants
- electron acceptor in photosynthesis - Vit K2
- produced by intestinal bacteria
- same structure as K1 but has double bonds
2
Q
What is Vit K3?
A
A provitamin synthetic form
3
Q
Where is Vit K sourced from?
A
- 50% from bacteria in large bowel
- Green leafy vege
4
Q
What is the main function of Vit K?
A
Role in blood clotting
5
Q
Describe Vit K deficiency and toxicity
A
- Deficiency from the diet is rare
- > secondary deficiency = occurs when there’s an inflammation in the gut e.g. Chrons
-Toxicity is rare
6
Q
How many fat soluble molecules doe Vit E represent?
A
8
7
Q
How is our Vit E intake?
A
Good
8
Q
What food sources do we get Vit E from?
A
- Polyunsaturated plant oils is the best
- Butter/marge
- Dark green leafy vege
9
Q
What is Vit E easily destroyed by?
A
Heat and oxygen
10
Q
What are the functions of Vit E?
A
- Fat soluble antioxidant
- Stabilises cell membrane
- Protects plasma lipoproteins from oxidative damage
11
Q
Describe VIt E deficiency and toxicity
A
Both rare, Vit E is the least toxic fat-soluble Vit
12
Q
What do studies show an inverse association between?
A
Between fruit/vege intake and cancer
