Plant composition comprising the phytocomplex of a plant species for nutritional, phytotherapeutic or cosmetic use, a mixture of phytocomplexes of several plant species； the plant composition comprises: - the intracellular material of the plant species obtainable by dispersion of the particulate plant material in a liquid medium and ultrasonication treatment in conditions capable of destroying the cell wall to cause release of said intracellular material in the liquid medium； and - the exhausted plant residue obtainable by the aforementioned ultrasonication treatment； the intracellular material is adsorbed on said exhausted plant residue and the weight ratio, based on dry matter, of the intracellular material to the exhausted solid residue is equal to at least 1.5 times the weight ratio of the intracellular material to the exhausted plant residue obtainable by the ultrasonication treatment.
