Table 1.

Quantification of quercetin in stool samples from different regions of the intestine obtained by liquid chromatography-mass spectrometry (LC-MS). Mean values for mice fed with standard and quercetin-enriched food are expressed in µg/mL for fecal sample and ng/10 mg for ileum tissue.

Sample Analysis	Standard Food (µg/mL)	Quercetin-Enriched Food (µg/mL)
Stool	Not Detected	696.47 ± 600.13
Duodenum content	Not Detected	108.44 ± 106.18
Ileum content	Not Detected	76.44 ± 54.21
Colon content	Not Detected	49.43 ± 0.46
Ileum tissue	Not Detected	0.26 ± 0.21