the present invention relates to a method for manufacturing microfibrillated polysaccharide , preferably microfibrillated cellulose . the invention also relates to microfibrillated cellulose obtainable by the method and use of the microfibrillated cellulose . the method of manufacturing microfibrillated cellulose comprises the following steps : a ) providing a hemicellulose containing pulp , b ) providing wood degrading enzymes c ) mixing pulp and enzymes d ) keeping the mixture in a continuous , flowing system of essentially cylindrical geometry , e ) conveying the mixture to one or more mixing zones for recirculating and homogenizing the mixture , and f ) harvesting microfibrillated cellulose with a relatively narrow size distribution during the recirculation .