An object of the present invention is to provide a magnesium silicate-based deterioration edible oil for regenerating agent having both a good leaving acid capacity and bleaching ability. The present invention provides a deterioration edible oil for regeneration agents, including magnesium silicate, magnesium said silicic acid is (1) 3 octahedral smectite group crystal system of clay minerals, (2) X in-ray diffraction measurement, 2 = integrated intensity in the 18 to 20 degrees of the peak I a and 2 = 26~28 degrees of integrated intensity in the peak I b ratio of I b / I a is 1~2, (3) SiO 2 / MgO molar ratio (X) is 1.2 to 3 according to the deterioration edible oil for regenerating agent, which is a .8.BACKGROUND【課題】良好な脱酸能力と脱色能力とを併せ持つケイ酸マグネシウム系劣化食用油用再生剤を提供する。【解決手段】ケイ酸マグネシウムを含む劣化食用油用再生剤であって、前記ケイ酸マグネシウムは、(1)3八面体型スメクタイト族粘土鉱物の結晶系であり、(2)X線回折測定において、2θ=18~20度のピークにおける積分強度Iaと2θ=26~28度のピークにおける積分強度Ibとの比率Ib/Iaが1~2であり、(3)SiO2/MgOモル比(X)が1.2~3.8であることを特徴とする劣化食用油用再生剤に係る。【選択図】なし