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NutrInsight • Do we need dietary polyphenols for health?
Polyphenols
Phenolic acids
Lignans
Flavonoids
Stilbenes
Others
CH3O HO
Syringic acid
Ferulic acid
CH2OH CH2OH
OCH3 OH
Chlorogenic acid Caffeic acid
RO
Resveratrol HO
H
OH
Tyrosol
Alkylresorcinols
H
Hydroxybenzoic acids
Anthocyanins
R1
R2
R3
R1 OH
R2
Others
O OH
COOH
HO 0
OH
R1
0-Glc
OH R2
Hydroxycinnamic acids
Flavonols
R1
Quercetin
Epicatechin
Hesperidin
Apigenin
Kaempferol
Catechin
HO 0
OH
R2
R1
OH
R2 R’
R
OH
OH 0 Flavanols
HO 0
OH
Flavanones
HO 0
OH 0
Flavones
Isoflavones
OH
HO 0
0
Others
Daidzein, Genistein
OH
Figure 1: The classification of polyphenols with some relevant examples of food sources
Source: Adapted from D’Archivio et al., 2007; Cheynier, 2005
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