THE PRESENT INVENTION PROVIDES SEEDS CAPABLE OF NOTICEABLY INCREASING EFFICIENCY OF FRACTIONATION OF RAW OILS AND FATS CONTAINING A PLURALITY OF OIL AND FAT COMPONENTS HAVING DIFFERENT COMPOSITIONS, A METHOD OF FRACTIONATING THOSE OILS AND FATS WITH THE AID OF THE SEEDS, AND A HIGHLY COLD-RESISTANT OILS AND FATS OBTAINED WITH THE FRACTIONATING METHOD. THE SEEDS ARE PRODUCED BY PROCESSING, UNDER HIGH PRESSURE OF 10 TO 400 MPA, OILS AND FATS CONTAINING A PLURALITY OF OIL AND FAT COMPONENTS HAVING DIFFERENT COMPOSITIONS AND SERVING AS THE SEEDS FOR THE INTENDED FRACTIONATION.