Abstract: A steam stripping substance, which is obtained by steam distillation of sesame oil under reduced pressure and contains sesamin analogues substantially, is mixed with water, a water-soluble solvent or their mixture serving as solvent. Sesamin analogues are caused to precipitate in this mixed system in the presence of more than one equivalent of an alkali with respect to the acid value of the steam stripping substance. The precipitated sesamin analogues are then separated from the mixed system.

Abstract: A food material containing sesaminol triglucoside by at least 3.0 mm per 1 g of its dry component is obtained by subjecting dehulled sesame seeds to an extraction process at an extraction temperature below 120.degree. C. with aliphatic hydrocarbon as extraction solvent to obtain a solution, removing the solution to obtain a solid which contains the extraction solvent by less than 10 weight %, adding water to this solid to obtain a water-containing object, and removing the residual solvent from this water-containing object by distillation at 20-120.degree. C. The food material thus obtained is substantially free of the solvent used in the extraction process and has improved color, flavor and taste.