tThis work aims to study supercritical anti-solvent micronization of marigold derived purified lutein thatwas dissolved in the mixture of hexane and ethyl acetate (70:30 v/v), the solvent used as the mobile phasefor chromatographic purification. The results show significant effect of pressure on the morphology ofmicronized lutein particles. The increase in lutein initial concentration from 1.5 mg/ml to 3.2 mg/mland the increase in SC-CO2flow rate from 15 ml/min to 25 ml/min show no significant effects on themorphology of lutein particles. However, the reduction of mean particle size from about 2 m to 0.8 mwas observed by increasing SC-CO2flow rate. The X-ray diffraction patterns of the micronized luteinparticles show apparent amorphous nature, while the Fourier transform infrared spectroscopy resultsshow that no chemical structural changes occurred. Moreover, the solubility of the micronized luteinparticles in aqueous solution was found to increase significantly from being almost insoluble to havingapproximately 20% solubility