Abstract: [Problem] To suppress the oxidized odor of an oil-and-fat, enhance and sustain the flavor and taste of a raw material oil-and-fat, provide or enhance the oil-and-fat flavor of meat, or provide an oil-and-fat imparted or enhanced with the oil-and-fat flavor of meat. [Solution] The present invention provides a flavor oil-and-fat obtained by adding a yeast digest to an edible oil-and-fat and heating the resulting mixture, wherein the yeast digest is a yeast autolysate or a yeast enzyme digest, contains a water-soluble component derived from yeast, an insoluble component derived from yeast, a lipid derived from yeast, at least 4 wt % of RNA, and at least 15 wt % of peptide, and contains 65% or more of water-soluble components after solubilization of the yeast.

Abstract: To suppress the oxidized odor of an oil-and-fat, enhance and sustain the flavor and taste of a raw material oil-and-fat, provide or enhance the oil-and-fat flavor of meat, or provide an oil-and-fat imparted or enhanced with the oil-and-fat flavor of meat. [Solution] The present invention provides a flavor oil-and-fat obtained by adding a yeast digest to an edible oil-and-fat and heating the resulting mixture, wherein the yeast digest is a yeast autolysate or a yeast enzyme digest, contains a water-soluble component derived from yeast, an insoluble component derived from yeast, a lipid derived from yeast, at least 4 wt % of RNA, and at least 15 wt % of peptide, and contains 65% or more of water-soluble components after solubilization of the yeast.

Abstract: Sweetness improving agents capable of improving sweetness characteristics, in particular, aftertaste characteristics. More particularly, the sweetness improving agents contain as the active ingredient a yeast extract, in particular, one containing sodium 5?-inosinate and/or sodium 5?-adenylate, sodium 5?-guanylate; sodium 5?-uridylate and sodium 5?-cytidylate, each in an amount of 1 to 15% based on the weight of the yeast extract, and 1 to 20% of sodium glutamate.

Abstract: Sweetness improving agents capable of improving sweetness characteristics, in particular, aftertaste characteristics. More particularly, the sweetness improving agents contain as the active ingredient a yeast extract, in particular, one containing sodium 5′-inosinate and/or sodium 5′-adenylate, sodium 5′-guanylate; sodium 5′-uridylate and sodium 5′-cytidylate, each in an amount of 1 to 15% based on the weight of the yeast extract, and 1 to 20% of sodium glutamate.