To provide an oyster meat extract having an action of suppressing aggravation of sleep efficiency, an action of improving sleep difficulty, an action of improving sleep based on items of QOL of sleep, and a suppression action of mid-wakefulness increase by maintaining the total number of arousal.SOLUTION: Oyster meat extract containing 3,5-dihydroxy-4-methoxybenzyl alcohol contained in an extract extracted from oyster meat as an active ingredient. An oyster meat extract containing as an active ingredient the above-mentioned compound produced by heating a raw pork meat in which the active ingredient is not detected in a raw state. Oyster meat extract obtained by heat-treating raw pork meat at 80 C. or more for 3 hours or more, preferably at 98 to 100 C. for 6 hours or more.Selection drawing None【課題】睡眠効率の悪化抑制作用、睡眠困難改善作用、睡眠のQOLの項目に基づく睡眠の改善作用、及び総覚醒回数の維持による中途覚醒増加の抑制作用を有するカキ肉エキスの提供。【解決手段】カキ肉から抽出された抽出物に含まれる3,5-ジヒドロキシ-4-メトキシベンジルアルコールを有効成分とするカキ肉エキス。生の状態では前記有効成分が検出されない生ガキ肉を、加熱することにより生成した前記化合物を有効成分とするカキ肉エキス。生ガキ肉を80℃以上で3時間以上、好ましくは98~100℃で6時間以上加熱処理したカキ肉エキス。【選択図】なし
