The invention relates to a lipid extract of the seeds of passion fruit, Passiflora incarnata and/or Passiflora edulis, preferably P. edulis, characterised in that said lipid extract is an oil of passion fruit seeds concentrated in its unsaponifiable fraction, containing between 3 wt. % and 100 wt. % of unsaponifiable matter in relation to the total weight of the extract. The invention also relates to a method for preparing such an extract and to a composition comprising said extract, especially for the use thereof in a dermatological or pharmaceutical composition or as a food.