TABLE 3.

Concentrations of the quantified retinoids in serum from 20 healthy men

Analyte	Mean ± SD(nM)	Minimum(nM)	Median(nM)	Maximum(nM)	Wilcoxon Signed-Rank TestFed vs. Fast P value
atRA
Fed	3.1 ± 0.9	1.7	2.9	5.2	0.82
Fasted	3.0 ± 0.6	1.9	3.1	4.4
13-cisRA
Fed	5.3 ± 5.7	2.4	3.9	29.0	0.27
Fasted	3.9 ± 1.0	2.7	3.8	7.3
9-cisRA
Fed	0.1 ± 0.1	0.05	0.09	0.49	0.14
Fasted	0.08 ± 0.02	0.05	0.09	0.15
9,13-dicisRA
Fed	0.4 ± 0.4	0.1	0.3	1.8	0.09
Fasted	0.3 ± 0.1	0.1	0.2	0.7
4oxo-13cisRA
Fed	17.8 ± 31	7.1	10.2	146	0.59
Fasted	12.2 ± 7.2	6.8	10.7	40.4