A premix for preparing an emulsion composition, wherein the premix is suitable to be used in a food or drink product containing docosahexaenoic acid, DHA, and eicosapentaenoic acid, EPA, by diluting the premix by a factor of 1 to 100, and wherein the premix satisfies the following requirements: 1 first oils and fats containing DHA and EPA being included in an oil phase, wherein the first oils and fats are triglycerides including DHA and EPA as constituent components, a total amount of DHA and EPA in the premix is 0.05 to 30 weight %, oils and fats containing DHA and EPA in which a first aqueous phase is dispersed at 1 to 38 weight% are used as the first oils and fats, and the first aqueous phase contains a water-soluble antioxidant at 2.5 to 65 weight% and a carbohydrate added so that a water-soluble content in the first aqueous phase is 18 to 79 weight%; 2 second oils and fats having a melting point of 10 to 42 °C being included in the oil phase at 25 to 99.5 weight%, wherein the second oils and fats are lauric oils and fats and amount to 0.8 times to 500 times the weight of the total amount of DHA and EPA; 3 a second aqueous phase being 0.8 to 280 times the weight of the oil phase, wherein the second aqueous phase is at least one selected from among milk, raw milk, skimmed milk, defatted concentrated milk, milk whey, and soymilk, or is a substance in which skimmed powder milk, whole powder milk, or whey powder milk is dissolved in water; and 4 the first aqueous phase, the oil phase and the second aqueous phase constituting a water-in-oil-in-water double emulsion oil and fat composition, wherein the premix further comprises an emulsifier, the emulsifier is one or both of a water-soluble emulsifier and an oil-soluble emulsifier, the water-soluble emulsifier is at least one selected from among a polyglycerin fatty acid ester, polysorbate, a sorbitan fatty acid ester, a sucrose fatty acid ester, and a glycerin fatty acid ester, and when included, an amount of the water-soluble emulsifier in the premix is 0.005 to 3 weight %, and the oil-soluble emulsifier is at least one selected from among polyglycerol condensed ricinoleate, a sucrose fatty acid ester, a glycerin fatty acid ester and lecithin, and, when included, an amount of the oil-soluble emulsifier in the premix is 0.1 to 3 weight %. 1 first oils and fats containing DHA and EPA being included in an oil phase, wherein the first oils and fats are triglycerides including DHA and EPA as constituent components, a total amount of DHA and EPA in the premix is 0.05 to 30 weight %, oils and fats containing DHA and EPA in which a first aqueous phase is dispersed at 1 to 38 weight% are used as the first oils and fats, and the first aqueous phase contains a water-soluble antioxidant at 2.5 to 65 weight% and a carbohydrate added so that a water-soluble content in the first aqueous phase is 18 to 79 weight%; 2 second oils and fats having a melting point of 10 to 42 °C being included in the oil phase at 25 to 99.5 weight%, wherein the second oils and fats are lauric oils and fats and amount to 0.8 times to 500 times the weight of the total amount of DHA and EPA; 3 a second aqueous phase being 0.8 to 280 times the weight of the oil phase, wherein the second aqueous phase is at least one selected from among milk, raw milk, skimmed milk, defatted concentrated milk, milk whey, and soymilk, or is a substance in which skimmed powder milk, whole powder milk, or whey powder milk is dissolved in water; and 4 the first aqueous phase, the oil phase and the second aqueous phase constituting a water-in-oil-in-water double emulsion oil and fat composition, wherein the premix further comprises an emulsifier, the emulsifier is one or both of a water-soluble emulsifier and an oil-soluble emulsifier, the water-soluble emulsifier is at least one selected from among a polyglycerin fatty acid ester, polysorbate, a sorbitan fatty acid ester, a sucrose fatty acid ester, and a glycerin fatty acid ester, and when included, an amount of the water-soluble emulsifier in the premix is 0.005 to 3 weight %, and the oil-soluble emulsifier is at least one selected from among polyglycerol condensed ricinoleate, a sucrose fatty acid ester, a glycerin fatty acid ester and lecithin, and, when included, an amount of the oil-soluble emulsifier in the premix is 0.1 to 3 weight %.