Fuente: WIPO "tomato" The presently claimed invention relates to the use of a cosmetic composition for maintain the scalp microbiome during and/or after chemical hair treatment or restoring the scalp microbiome after chemical hair treatment, and the related method for treating hair. The cosmetic composition comprises at least a mixture of at least two liquid oils being at least one liquid fatty acid oil and at least one liquid hydrocarbon oil, and at least one solid fat and/or wax.