The present invention relates to the use of selected active principles of a natural origin in substitution of extract from Boehmeria Nipononivea for regulating the trophism of hair follicles and the production of sebum on the skin and its use in alopecia, with considerable practical advantages and with respect to the safety profile. The composition of the invention is based on an association of omega 6 polyunsaturated acids and rutin in a pharmaceutically acceptable carrier.