An enzymatic-based process of extracting value added products from oil seed and grain biomasses is described. The process comprises an alkaline pretreatment step followed by treatment with a proteolytic enzyme, and provides increased product yield and solubility. The products obtained can be soluble protein/peptide and purified dietary fiber. The use of such a process in the production of a food, drink, cosmetics, feed or feed additive product is also described.
