The present disclosure relates to a cosmetic or dietary composition for combating human or animal hair loss and/or promoting hair growth and/or regrowth and/or enhancing the beauty thereof (shine, softness, strength) and/or enhancing scalp comfort, comprising at least miliacin in a proportion greater than 0.1% by mass with respect to the total mass of the composition and polar lipids in a proportion greater than 0.1% by mass with respect to the total mass of the composition, including sphingolipids, particularly ceramides and/or glycosylceramides, and/or phospholipids in a proportion greater than 0.1% by mass with respect to the total mass of the composition. The present disclosure further relates to the use of such a composition, and the method for preparing such a composition.