Table 1.

The particle size, PDI and zeta potential of vesicles prepared by different methods (n=3).

Sample	Preparation method	Size (nm)	PDI	Zeta potential (mV)
Blank vesicles	Dilution	1421±84	0.294±0.041	−49.5±2.3
Blank vesicles	Direct preparation	1629±251	0.823±0.146	−49.8±1.3
Insulin-loaded vesicles	Dilution	871±42	0.187±0.058	−39.4±2.0