The percentage of recrystallization index of SLN, which is calculated from the melting enthalpy of the lipid in the dispersion, expressed as the percentage of the melting enthalpy of the bulk lipid. The bulk lipid has the index of 100% due to being considered completely crystalline. Therefore, 5 and 10% (w/w) lipid possessed approximately 19 and 45% RI, respectively.