Table 2.

The apparent permeability (P_app) and absorption rate of baicalin across Caco-2 cell monolayers.

Sample	Apical side baicalin concentration (μg/mL)	P app (×10−6 cm/s)	Absorption rate in 3 h	Absorption level
Pure baicalin∗	—	0.66 ± 0.10	~1%	Low
GQD	27.6	3.40 ± 0.21	35%	Medium
MA	12.9	6.60 ± 0.18	67%	High
400 g supernatant	14.2	6.59 ± 0.29	66%	High
MNA	12.8	7.30 ± 0.17	74%	High

^∗Data is cited from [26, 27]. n = 4. P_app > 5 × 10⁻⁶ cm/s: high absorption; P_app  =  1~5  ×  10⁻⁶ cm/s: medium absorption; P_app < 1 × 10⁻⁶ nm/s: low absorption.