Vitamin E Flashcards
(5 cards)
1
Q
What are the two types of Vitamin E supplements?
A
Natural form (D-alpha-tocopherol) and synthetic form (DL or dl-alpha-tocopherol).
2
Q
How does the biological activity of natural Vitamin E (D-alpha-tocopherol) compare to synthetic Vitamin E?
A
Natural D-alpha-tocopherol is 1.4 times more biologically active than synthetic form.
3
Q
What is a potential issue with synthetic dl-alpha-tocopherol?
A
It may inhibit the natural d form from entering cells.
4
Q
Why are alpha-tocopherol supplements often esterified?
A
To prolong shelf life and protect antioxidant properties.
5
Q
How does the body handle esterified forms of alpha-tocopherol like alpha-tocopheryl acetate or succinate?
A
The body hydrolyses and absorbs these esters efficiently as alpha-tocopherol.
