A method for preparing a dispersion of polar lipids in an ethanol-water mixture, the polar lipids including galactolipids. An oil containing polar lipids including galactolipids is diluted using a first ethanol-water mixture having an ethanol concentration close to the critical polarity, wherein upon dilution the polar lipids form a lamellar liquid-crystalline phase, without first forming a hexagonal HII-phase. The invention also refers to an oil obtained by evaporating ethanol and water from the dispersion. The invention further refers to aqueous colloidal dispersions of polar lipids including galactolipids, to an oil containing polar lipids including galactolipids and to pharmaceutical, cosmetic and food compositions including such dispersions and/or oil.
