The present invention provides an oil-in-water type emulsion for light-exposing food having photodegradation-resistance, which has good taste and flavor with less deterioration such as off-taste and off-flavor even when irradiating light from a fluorescent lamp, etc. The first embodiment thereof is an oil-in-water type emulsion for light-exposing food containing fat and nonfat milk solids, wherein the fat is non-milk fat, or non-milk fat and milk fat, and the non-milk fat has such a constituent fatty acid composition that the total amount of lauric acid and palmitic acid is not less than 40%, the total amount of oleic acid, linoleic acid and llnolenic acid is not more than 50% and the total amount of linoleic acid and linolenic acid is not more than 5%and the ratio of milk fat/total fat is not more than 0.95. The second embodiment thereof is a nonfat milk solid-containing oil-in-water type emulsion for light-exposing food, which is the same as the emulsion of the first embodiment and the fat is non-milk fat having the above constituent fatty acid composition.本發明提供一種使受光照食品具有抗光降解性之水中油型乳液,其具有良好口味與香味,即使受到螢光燈照射等等時,敗壞(如:失去口味與失去香味)之程度低。其第一具體實施例為一種水中油型乳液,用於含脂肪與非脂肪乳固形物之受光照食品,其中該脂肪為非乳脂肪、或非乳脂肪與乳脂肪,且該非乳脂肪之脂肪酸組成中,月桂酸與棕櫚酸之總量不低於40%,油酸、亞麻油酸與次亞麻油酸之總量不超過50%,亞麻油酸與次亞麻油酸之總量不超過5%;而且乳脂肪/總脂肪之比例不超過0.95。其第二具體實施例為用於受光照食品之含非脂肪乳固形物之水中油型乳液,其與第一具體實施例之乳液相同,且該脂肪為具有如上述脂肪酸組成之非乳脂肪。
