It refers to a process which aims to improve the oxidation stability of compounds composed of polyunsaturated omega-6 fatty acids, including the following steps: (1) providing a starting component, including at least one polyunsaturated omega-6 fatty acid component; (2) providing lysine component; (III) agitate the aqueous solution, the water alcohol solution or the initial composition and composition of the lysine alcohol solution, and then place the resulting mixture under spray drying conditions,The composition of a solid product thus formed includes at least one salt separated from lysine, the anion of which is separated from the polyunsaturated omega-6 fatty acid; the composition of the product contains SC solvent content selected from the following ingredients: SC lt; 5% by weight, SC lt; 3% by weight, SC lt; 1% by weight, SC lt 0.5% by weight These compounds are available for cancer treatmentSe refiere a un proceso para aumentar la estabilidad hacia la oxidacion de una composicion que comprende acidos grasos omega-6 poliinsaturados que comprende las siguientes etapas: (i) proporcionar una composicion de partida que comprende al menos un componente acido graso omega-6 poliinsaturado; (ii) proporcionar una composicion de lisina; (iii) mezclar soluciones acuosas, acuoso-alcoholicas o alcoholicas de composicion de partida y composicion de lisina, y someter posteriormente la mezcla resultante a condiciones de secado por pulverizacion, formando asi una composicion de producto solido que comprende al menos una sal de un cation derivado de lisina con un anion derivado a partir de un acido graso omega-6 poliinsaturado; la composicion del producto que presenta un contenido de disolvente SC seleccionado entre los siguientes: SC <;5% en peso, SC <;3% en peso, SC <;1 %en peso, SC <;0.5% en peso. Dichos compuestos obtenibles son utiles en el tratamiento de cancer