PROBLEM TO BE SOLVED: To provide an immunopotentiating agent given by using natural components to which chemical treatment is not applied, and food and drink products furnished with an immunopotentiating effect.SOLUTION: The immunopotentiating agent and the immunopotentiating food and drink products are each given by combining gramineous grains, such as oats, a processed product thereof, and lactic acid bacteria, such as Lactobacillus gasseri. A mixture containing the gramineous grains, the processed product thereof, and the lactic acid bacteria produces synergistically increased quantity of a cytokine and is enhanced in the immunopotentiating effect, because a macrophage is more activated in the mixture than in each component.【課題】 化学的処理を施さない、天然の成分を用いた免疫増強剤、及び免疫増強効果を賦与した飲食品を提供する。【解決手段】オーツ麦などのイネ科穀粒及びその加工物とラクトバチルス・ガセリなどの乳酸菌とを組み合わせた免疫増強剤及び免疫増強用飲食品。イネ科穀粒及びその加工物と乳酸菌とを含有する混合物は、それぞれが単独のものよりもマクロファージが活性化されサイトカイン産生量が相乗的に高まり免疫増強効果が増大する。【選択図】 なし
