Cosmetic Composition for the Treatment of Hair, Particularly Oily Hair, Based on an Extract of Yarrow (Achillea Millefolium L)

1. A process for the preparation of a non-allergenic dry extract of yarrow, comprising the steps of mixing flower tops of yarrow with water to produce an infusion, filtering said infusion to separate a solid residue from an aqueous extract, mixing said solid residue with methanol to produce a methanol solution, filtering said methanol solution and recovering a methanolic extract therefrom, mixing said aqueous extract and said methanolic extract to produce a water-methanol solution, oxidizing said water-methanol solution with sodium hypochlorite at room temperature and then after filtration recovering said dry extract of yarrow from the oxidized water-methanol solution by a technique selected from the group of techniques consisting of evaporation, atomization and freeze-drying.