Pure Maltodextrin is high quality and fast digesting powder. It is an ingredient of many protein supplements, and other food products. Itâs a kind of fast-digesting carbohydrate source. Maltodextrin is a white powder, which is prepared from corn, potato starch, rice, or wheat. Even though it is derived from plants, maltodextrin is highly processed. This white powder has a neutral taste, and is water-soluble. It is commonly used as a thickener / filler in many processed foods. Also, it is useful for thickening products like gelatins, instant pudding, salad dressings, etc.