The present invention relates to the field of weight management and obesity. It concerns petroselinic acid or a combination of active ingredients including at least petroselinic acid and at least one compound chosen from zinc, taurine, one of the salts of same, lycopene and the mixtures thereof, and preferably at least taurine or zinc gluconate and, more preferably still, at least taurine and zinc gluconate, as a drug for oral administration or as a functional food intended to promote weight loss and/or weight maintenance in a human being and/or animal, or indeed intended to fight obesity.
