The invention relates to separated, decompacted, cellulose-based fibres acquired from a vegetable raw material, wherein the separated, decompacted, cellulose-based fibres have an aspect ratio after soaking in water of longitudinal diameter to transverse diameter of 1:1 to 1000:1 and a water-binding capacity of >；200 wt.% and a water retention capacity of >；50%, and a method for acquiring and producing these separated, decompacted cellulose-based fibres. The purification method involves incubation of the vegetable material with an aqueous decomposition solution containing at least one dissolved amino acid and/or peptide with 2-50 amino acids to decompose the compacted cellulose-based fibres.
