Table 4.

Effect of Storage on Physical Properties of the Optimum Formulation S1

Parameter	S1 Fresh	S1 After 45 Days at 4°C	S1 After 45 Days at 25°C	S1 After 90 Days at 4°C	S1 After 90 Days at 25°C
EE%	66.54 ± 7.57	66.68 ± 1.90	68.82 ± 1.18	66.67 ± 2.20	67.60 ± 3.68
VS (nm)	206.20 ± 4.95	210.30 ± 7.42	207.40 ± 3.96	219.00 ± 2.19	211.50 ± 0.78
PDI	0.39 ± 0.00	0.47 ± 0.03	0.46 ± 0.02	0.42 ± 0.02	0.40 ± 0.03
ZP (mV)	−29.60 ± 0.99	−30.60 ± 0.07	−28.90 ± 1.34	−31.00 ± 0.14	−30.00 ± 1.13

Note: Data are presented as mean ± SD (n = 3).

Abbreviations: EE%, encapsulation efficiency percent; VS, vesicle size; PDI, polydispersity index; ZP, zeta potential.