A functional food in the form of agglomeration powder which has the characteristics of easily soluble in water. Functional food product in accordance with the present invention contains carbohydrates of oligosaccharides component rich of food-fiber, and also serves as prebiotic. The advantages of this functional food are sugar free, Trans Fat free, and lactose-free. Moreover, it can be widely applied both in the food and beverages so that to facilitate consumers in consuming to the products.