PURPOSE: A feed additive and health food with the immunity promotion effect and the natural antibiotic effect are provided to produce clean livestock products by using nature propolis instead of broad-spectrum antibiotics. CONSTITUTION: A feed additive and health food with the immunity promotion effect and the natural antibiotic effect are obtained by mixing 95~96parts of chito-oligosaccharide by weight, 2~3parts of mushroom fermented-dried powder by weight, 1~3parts of propolis by weight, and 0.1~2parts of grapefruit seed extract by weight.본 발명은 키토올리고당, 버섯발효건조분말, 프로폴리스 및 자몽종자 추출물을 혼합하여 제조된 것을 특징으로 하는 면역력 증진 및 천연 항생제 효과를 갖는 사료첨가제 및 건강식품에 관한 것이다.
