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Thermal stability of NLC formulations in terms of size (A), PDI (B) and Zeta potential (C), at the end each temperature cycle. 1 cycle = 7 days of storage (4 days at 40°C followed by 3 days at 15°C). NOTE: One-way ANOVA/Tukey were used to analyze intragroup statistics; *p< 0.05. PDI: polydispersion index.
