The invention describes a combination of at least one aromatase inhibitor selected from the group of chemical-synthetic aromatase inhibitors and aromatase inhibition exhibiting extracts of soya beans and rapeseed, respectively, and at least one plant extract that contains one or more active ingredient substance(s) extracted from the plant, which is(are) selected from the group of 5α reductase type I and/or type II inhibitors and androgen receptor blockers, said combination being contained for example in a composition and having special properties for influencing hair growth. Uses of this combination are also described.