14 Flavonoids Flashcards Preview

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Flashcards in 14 Flavonoids Deck (15):
1

Phytochemical definition

natural chemicals found in plants
generally non-nutritive
physiologically active components
disease prevention

2

Flavonoids are a subclass of?

polyphenols
- secondary metabolites of plants
- essential to plant physiology

3

Common structural feature of polyphenols?

aromatic rings with atlas one hydroxyl group

4

most abundant polyphenols in food

phenolic acids and flavonoids

5

Why such a large variability in polyphenols in food?

light
genetic factos
environment
germination
degree of ripeness
variety
processing
storage

6

Vitamin P

Flavonoids
- P for pigment

7

Flavonoids enhance what vitamin

Vit C
- improves absorption, and protects from oxidation

8

Flavonoids are ubiquitis

present in most plants

9

Basic structure of flavonoids

2 aromatic rings (OH hydroxyl arising from both)
- one arising from acetate pathway
- one from shikimate pathway

center ring determines class of flavonoid

10

6 classes of flavonoids **

flavones
flavonoles
flavanones
flavanols
anthocyanidins
isoflavones

11

flavonoids food sources

widely distributed
- fruits, veges, tea, cocoa, wine
- one outer part of plant, lower conc towards center

12

flavonoids are usually attached/conjugated to..

carbohydrate moieties

13

purpose of glycoside form (glycosylation)

increases polarity
necessary for storage in plant vacuoles

14

Main biological effects of flavonoids

1. anti-oxidant
2. hormonal/anti-hormonal
-isoflavone
3. anti-proliferation
-cancer

many others

15

Major disease related effects

cancer
CVD

others: aging, diabetes, etc
- virtually anything related to oxidative stress