Bacterial communities and metabolic activity of faecal cultures from equol producer and non-producer menopausal women under treatment with soy isoflavones

Table 1 Isoflavone levels (μg/ml) in faecal cultures from equol-producing and non-producing women in mMCB_ISO medium

Sample	Isoflavone	Primary cultures	Secondary cultures
WC^a	Daidzin	0.24 ± 0.09	24.69 ± 5.10
	Daidzein	1.74 ± 0.07	under LOQ^c
	Equol	2.62 ± 0.04	under LOQ
WG^a	Daidzin	0.05 ± 0.02	0.12 ± 0.06
	Daidzein	under LOQ	under LOQ
	Equol	3.07 ± 0.24	7.67 ± 0.64
WP^a	Daidzin	0.09 ± 0.04	0.18 ± 0.07
	Daidzein	0.02 ± 0.01	under LOQ
	Equol	1.40 ± 0.06	4.02 ± 0.35
WE^b	Daidzin	under LOQ	under LOQ
	Daidzein	24.10 ± 3.32	45.57 ± 5.46
	Equol	under LOQ	under LOQ
Uninoculated culture media	Daidzin	16.83 ± 2.89	N.A.
	Daidzein	5.57 ± 1.19	N.A.
	Equol	under LOQ	N.A.
Slackia equolifaciens	Daidzin	16.53 ± 3.68	N.A.
	Daidzein	0.06 ± 0.05	N.A.
	Equol	2.01 ± 0.10	N.A.

N.A. not applicable, mMCB _ISO modified medium for colonic bacteria supplemented with isoflavones
^aequol-producing woman
^bequol non-producing woman
^c LOQ Limit of quantification (0.002 μg/ml for equol; 0.004 μg/ml for daidzein and 0.014 for daidzin)

ISSN: 1471-2180