To provide a novel method for suppressing heat discoloration of lecithin and a novel lecithin or lecithin preparation having resistance to heat discoloration. A method for suppressing heat discoloration of lecithin, comprising adding a fatty acid metal salt to lecithin, and a lecithin or lecithin preparation having resistance to heat discoloration and containing a fatty acid metal salt. Preferably, the metal constituting the fatty acid metal salt is at least one selected from the group consisting of lithium, beryllium, sodium, magnesium, aluminum, potassium, calcium, iron, cobalt, nickel, copper, zinc, silver, barium, thallium, and lead, and the fatty acid of the fatty acid metal salt is at least one selected from saturated fatty acids and unsaturated fatty acids having 3 to 36 carbon atoms.本發明提供一種用以抑制卵磷脂之加熱著色之新穎之方法、以及加熱著色獲得抑制之新穎之卵磷脂及卵磷脂製劑。一種卵磷脂之加熱著色抑制方法，其特徵在於，向卵磷脂中添加脂肪酸金屬鹽；及一種加熱著色獲得抑制之卵磷脂或卵磷脂製劑，其特徵在於，含有脂肪酸金屬鹽。構成脂肪酸金屬鹽之金屬較佳為選自由鋰、鈹、鈉、鎂、鋁、鉀、鈣、鐵、鈷、鎳、銅、鋅、銀、鋇、鉈及鉛所組成之群中之至少1種，脂肪酸金屬鹽之脂肪酸較佳為選自碳數3~36之飽和脂肪酸及不飽和脂肪酸中之至少1種。
