Table 2.

Hydrodynamic diameter, polydispersity index (PDI), ζ potential and encapsulation efficiency (%) (EE), of GTP loaded casein nanoparticles

Conc. of GTP (mg/mL)	Hydrodynamic diameter (nm)	PDI	ζ potential (mV)	EE (%)
1.0	77.3 ± 15.65d	0.532 ± 0.15b	-29.7 ± 1.23a	65.409 ± 2.151c
2.5	313.4 ± 9.87b	0.178 ± 0.17d	-24.5 ± 0.27b	71.101 ± 0.133b
5.0	275.4 ± 9.15c	0.276 ± 0.20c	-24.2 ± 0.52b	76.945 ± 2.935a
10.0	428.1 ± 13.79a	2.591 ± 0.35a	-22.9 ± 1.02b	70.261 ± 0.953b

Data represented as mean ± SD (n = 3). Different letters (a, b, c, and d) indicate significant difference within the group according to DMRT, p ≤ 0.05.