Nano-encapsulation renders curcumin completely dispersible in aqueous media. (a) Free curcumin is poorly soluble in aqueous media, and macroscopic flakes can be seen floating in the bottle. In contrast, the equivalent quantity of curcumin encapsulated in polymeric nanoparticles is fully dispersible in aqueous media (b).
Bisht et al. Journal of Nanobiotechnology 2007 5:3 doi:10.1186/1477-3155-5-3