PROBLEM TO BE SOLVED: To provide a novel hepcidin expression inhibitor which effectively utilizes waste. SOLUTION: An hepcidin expression inhibitor containing an extract of grape seeds and / or pericarp as an active ingredient. [Selection diagram] None【課題】廃棄物を有効に利用した新規なヘプシジン発現抑制剤を提供すること。【解決手段】ブドウの種子及び/又は果皮の抽出物を有効成分として含む、ヘプシジン発現抑制剤。【選択図】なし