Without increasing the size of an existing capsule product, a further health-promoting component is sealed into the soft capsule while maintaining the DHA and EPA content of the existing product. A fish oil concentrated such that the content of docosahexaenoic acid is greater than or equal to 50% and a fish oil containing greater than or equal to 15% eicosapentaenoic acid are used, and these are mixed with the other health-promoting component, which is an oil that is liquid at room temperature.本發明不放大既有產品的尺寸,維持既有產品所包含DHA、EPA份量的同時,進一步將其他健康成份封入軟膠囊中。本發明使用二十二碳六烯酸含有率濃縮至50%以上的魚油與二十碳五烯酸含有率15%以上的魚油,將此等與在常溫下為液態油的其他健康成分混合。