Fig. 1

Physicochemical characterization of andrographolide-loaded nanostructured lipid carriers (AndroNLCs). (A) Transmission electron micrograph of AndroNLCs, (B) the stability of Blank and AndroNLCs during 3 months of storage in distilled water at 25 °C, particle size and polydispersity index (PDI), (C) the zeta potential, and (D) the stability of AndroNLCs during 4 h of treatment in simulated gastric fluid (SGF) and simulated intestinal fluid (SIF) at 37 °C. PdI was measured in distilled water.