A composition comprising a constituent-A, which constituent-A consists of: - a polylysine component, and - a fibrous component, wherein the polylysine component is selected from the group consisting of polylysines-X and mixtures thereof, and wherein the polylysines-X are selected from the group consisting of hyperbranched polylysines and primary ammonium salt of hyperbranched polylysines, wherein each one of the polylysines-X has a degree of branching as determined by 1 H-NMR spectroscopy disclosed in the specification, of at least 0.30 and at most 0.60, an apparent viscosity as determined by the Rheometry Method disclosed in the specification, of at least 400 and at most 8000 mPa.s, and a gel content as determined by the Gel-Content Method disclosed in the specification, of at most 4.0 %, and the fibrous component consists of at least one fibrous element which fibrous element comprises vegetable fibers, and wherein the fibrous element is free of any fibers other than the vegetable fibers, and wherein the composition is free of any fibers other than the vegetable fibers of the fibrous component, and wherein the composition optionally comprises a constituent-B which is selected from the group consisting of proteins and mixtures thereof, and the constituent-B is different and distinct from any other component and constituent of the composition, in an amount of at most 0.30 wt.% of the composition, and wherein the composition optionally comprises a constituent-C which is selected from the group consisting of polyphenolic macromolecular compounds and mixtures thereof, wherein each of the polyphenolic macromolecular compounds is a macromolecular compound which bears a multitude of phenol or polyhydroxybenzene radicals, and the constituent-C is different and distinct from any other component and constituent of the composition, in an amount such that the ratio of the total weight of the constituent-C divided by the total weight of the polylysine component is at most 0.40. - a polylysine component, and - a fibrous component, the polylysine component is selected from the group consisting of polylysines-X and mixtures thereof, and wherein the polylysines-X are selected from the group consisting of hyperbranched polylysines and primary ammonium salt of hyperbranched polylysines, wherein each one of the polylysines-X has a degree of branching as determined by 1 H-NMR spectroscopy disclosed in the specification, of at least 0.30 and at most 0.60, an apparent viscosity as determined by the Rheometry Method disclosed in the specification, of at least 400 and at most 8000 mPa.s, and a gel content as determined by the Gel-Content Method disclosed in the specification, of at most 4.0 %, and the fibrous component consists of at least one fibrous element which fibrous element comprises vegetable fibers, and wherein the fibrous element is free of any fibers other than the vegetable fibers, and wherein the composition is free of any fibers other than the vegetable fibers of the fibrous component, and wherein the composition optionally comprises a constituent-B which is selected from the group consisting of proteins and mixtures thereof, and the constituent-B is different and distinct from any other component and constituent of the composition, in an amount of at most 0.30 wt.% of the composition, and wherein the composition optionally comprises a constituent-C which is selected from the group consisting of polyphenolic macromolecular compounds and mixtures thereof, wherein each of the polyphenolic macromolecular compounds is a macromolecular compound which bears a multitude of phenol or polyhydroxybenzene radicals, and the constituent-C is different and distinct from any other component and constituent of the composition, in an amount such that the ratio of the total weight of the constituent-C divided by the total weight of the polylysine component is at most 0.40.