Materials were then washed under mild conditions to minimise losses of soluble fiber components (such as pectins and pentosans) as well as bioactive compounds (such as flavonoids, phenolic acids and tannins). Washing reduced free sugar and ash contents, while drying at temperatures below 65 C avoided changes in the functional properties and in the contents of bioactive compounds. Grinding to a relative large particle size was done to maintain the hydration characteristics and the textures of the fiber concentrates.