A method for extracting an unsaponifiable fraction from a renewable raw material selected among oilfruits, oleaginous seeds, oleoproteaginous seeds, seed husks, oil-yielding almonds, sprouts, stones and cuticles of fruits, high-fat raw materials from animals, algae, fungus or yeast, includes the following steps: a) dehydrating and packaging the renewable raw material, not resulting in any extraction of the fat； b) reactive crushing of the fatty packaged raw material in the presence of a light alcohol and a catalyst； c) evaporating the light alcohol； d) concentrating the liquid phase such as to obtain a concentrate including the unsaponifiable fraction diluted in fatty acid alkyl esters； e) saponifying the unsaponifiable concentrate； f) extracting the unsaponifiable fraction from the saponified mixture. The use of an unsaponifiable fraction or co-products obtained by implementing the method for preparing a composition such as a cosmetic, drug, food, or food additive or supplement is also described.
