Table 2. Stability of Optimum NCE and FPNCE Formulations Stored during 2 Months of Storage at 4 ± 2 °C^a.

	vesicle size (nm)			PDI
time of storage (day)	NCE	FPNCE	p value	NCE	FPNCE	p value
0	184.0 ± 4.5	192.5 ± 8.9	NS	0.103 ± 0.007	0.142 ± 0.012	<0.05
30	231.7 ± 9.5	224.5 ± 11.7	NS	0.143 ± 0.014	0.175 ± 0.024	<0.05
60	297.9 ± 13.2	275.6 ± 14.5	NS	0.274 ± 0.024	0.235 ± 0.017	<0.01

	EE(CIS) (%)			EE(EPI) (%)
time of storage (day)	NCE	FPNCE	p value	NCE	FPNCE	p value
0	85.48 ± 1.23	91.24 ± 1.32	<0.01	68.52 ± 1.48	71.93 ± 1.11	NS
30	80.37 ± 1.75	89.75 ± 0.67	<0.01	63.49 ± 2.08	69.25 ± 1.25	<0.01
60	76.21 ± 1.78	85.29 ± 1.45	<0.01	59.54 ± 0.91	65.28 ± 2.24	<0.01

^aData presented as the average ± SD, n = 3; NS: not significant.