A process for increasing the stability of a composition containing a polyunsaturated omega-3 fatty acid against oxidation proceeds by (i) providing a starting composition containing at least one polyunsaturated omega-3 fatty acid component； (ii) providing a lysine composition； (iii) admixing an aqueous, an aqueous-alcoholic or an alcoholic solution of starting composition and lysine composition, and subjecting resulting admixture to spray drying conditions subsequently, thus forming a solid product composition containing at least one salt of a cation derived from lysine with an anion derived from a polyunsaturated omega-3 fatty acid； the product composition exhibiting a solvent content SC selected from the following: SC<；5 wt %, SC<；3 wt %, SC<；1 wt %, or SC<；0.5 wt %.
