Nanoemulsions are nanometer droplets made by the heterogeneous dispersion’s of two immiscible liquids (oil-in-water or water-in-oil) to provide a transparent ocular drug delivery system.
Nano emulsions consist of fine oil-in-water dispersion’s, having droplets covering the size range of 100–600 nm.
Nano–emulsions are prepared using the spontaneous emulsification mechanism which occurs when an organic phase and an aqueous phase are mixed.
Here you see what happens in your intestines when you take nano emulsion Terpenes.
This explains the technicality of it.