Orally administratable cosmetic compositions, notably formulated as food supplements, useful for the prevention and/or treatment of functional disorders of the pilosebaceous structural unit of mammals, in particular by combating the cutaneous activation of the androgens over time, and especially for the treatment of oily and/or hyper-seborrheic skin and/or scalp, thin hair, hypertrichosis and/or alopecia in humans, comprise thus effective amounts of immixture of polyunsaturated fatty acids, flavonoids and stilbenes, formulated into orally administratable, physiologically acceptable media therefor.