Antioxidants Flashcards
1
Q
Vitamin E Function
A
- protect polyunsaturated fats from oxidation
- protect RBC from lysing
- supports RBC membrane
- nerve and muscle development
- lung cells
- fights infection
- aids in absorption of vitamin A
2
Q
How is vitamin E transported and stored?
A
- transported via LDLs and VLDLs and incorporated into chylomicron to be transported into the liver
- 90% is stored in adipose tissue and the other 10% is stored in the cell membrane
3
Q
Compare and contrast the 2 forms of vitamin E
A
tocopherols - biologically active form - found in cell membrane alpha - tocopherols - most active form - predominant in foods
4
Q
RDA for Vitamin E
A
15 mg/day of alpha - tocopherol
5
Q
Forms of vitamin C
A
ascorbic acid and dehydroascrobic
6
Q
function of vitamin C
A
synthesizes
- collagen
- B6
- DNA
- serotonin
- carotene
- hormones
- helps WBC
- protects lungs from ozone and smoke damage
- nitrosamines reduction
- enhances iron absorption
- regenerates oxidized vitamin E
7
Q
RDA for Vitamin C
A
-90 mg for men
- 75 mg for women
UL = 2,000 mg
8
Q
Forms of selenium
A
- selenomethionine (stored)
- selenocytoeine (active)
9
Q
function of selenium
A
- rejuvenates vitamin E
- thyroid hormon production
- body temp and metabolism regulation
10
Q
RDA for selenium
A
55 ug/day
UL = 400 ug/day
11
Q
quick description of beta carotene
A
- is a phytochemical (so found frequently in plants)
- precursor for retinol
- provitamin (active form)
- fat soluble
- carotenoid
12
Q
Function of beta carotene
A
- lipid oxidation prevention
- enhances immune response
- protect skin from UV
- weak antioxidant (compared to vitamin E)
- protects eyes from aging
- in high consumption, has decreased cancer
13
Q
RDA for beta carotene
A
no known RDA or UL
14
Q
List the forms of vitamin A
A
- retinal
- retinol
- retinoic acid
15
Q
How is vitamin A stored and transported?
A
- stored in the liver
- has to be aided to be transported
