Flavonoids

Question 1

Subclasses of flavonoids and their distinguishing actions

Answer 1

Flavones

Flavonols

Flavanones

Anthocyanins

Catechins

Isoflavones - phytoestrogens; protective against CVD and various cancers

Question 2

Most likely to find flavonoids

Answer 2

All vascular plants

Epidermal cells of the leaves

Question 3

What do flavonoids do for plants

Answer 3

UV protection

Question 4

Major action of flavonoids in humans

Answer 4

Antioxidant

As well as anti-inflammatory, capillary strengthening, anti-thrombotic/anti-platelet, anti-viral, hypotensive

Question 5

Common names of flavonoids

Answer 5

Rutin
Hesperidin
Quercetin
Silybin

Question 6

Parts of plants used in flavonoids herbs

Answer 6

Silybum marianum - seeds

Scutellaria baicalensis - root

Gingko biloba - leaves

Crataegus monogyna - leaves, flowers, fruit

Question 7

Adverse reactions flavonoid herbs

Answer 7

Silybum marianum - potential allergy

Scutellaria baicalensis - none known

Gingko biloba - potential GIT upset, headaches, dizziness

Crataegus monogyna - GIT upset, sweating, nausea, rash, fatigue, agitation, dizziness, palpitations

Question 8

Which herb produces silymarin? What chemical class does it belong to?

Answer 8

Silybum marianus, milk thistle.

Flavonoid

Polyphenolic compound

Question 9

Which flavonoid herb has significant actions on the cardiovascular system?

Answer 9

Crataegus monogyna, hawthorn

Question 10

Actions of flavonoid herbs

Answer 10

Silybum marianum - hepatoprotective and trophorestorative, choloretic, antioxidant, galactalogue, digestive tonic

Scutellaria baicalensis - antioxidant, anti-inflammatory, anti-allergic

Gingko biloba - antioxidant, anti-platelet, circulatory stimulant, nootropic

Crataegus monogyna - cardioprotective, cardiotonic, hypotensive, anti-arrhythmic, peripheral vasodilator, antioxidant, astringent, collagen stabilising