Beer Polyphenols and Menopause: Effects and Mechanisms—A Review of Current Knowledge

Table 2

Phenolic acids contained in different types of beer.

Molecule	Mean content (mg/100 ml)
	Alcohol-free	Ale	Dark	Regular
Hydroxybenzoic acids
2,6-Dihydroxybenzoic acid				0.0900
2-Hydroxybenzoic acid	0.0011			0.2000
3,5-Dihydroxybenzoic acid				0.0300
3-Hydroxybenzoic acid				0.0300
4-Hydroxybenzoic acid	0.0073	0.1100	0.0700	0.9600
Gallic acid		0.1100	0.0300	0.0700
Gallic 3-O-gallate				0.2600
Gentisic acid				0.0300
Protocatechuic acid	0.2700	0.0600	0.0400	0.0500
Syringic acid		0.1100		0.0200
Vanillic acid	0.0300	0.2900	0.1700	0.0700
Hydroxycinnamic acids
4-Caffeoylquinic acid				0.0100
5-Caffeoylquinic acid				0.0800
Caffeic acid	0.0100	0.0075	0.0300	0.0300
Ferulic acid	0.1200	0.3300	0.0900	0.2600
m-Coumaric acid				0.0200
o-Coumaric acid				0.1500
p-Coumaric acid	0.4000	0.1200	0.0500	0.1000
Sinapic acid	0.0073	0.0700	0.0300	0.0200
Hydroxyphenylacetic acids
4-Hydroxyphenylacetic acid				0.0300
Homovanillic acid				0.0500

Data from the Phenol-Explorer database [12].