A composition provides increased. lithium and selenium content in vegetables and in their bio-technologically and/or technologically processed products. This composition comprises an aqueous solution of lithium compounds and selenium salts having a lithium content ranging from 0.0001 to 15.Og/l and selenium ranging from 0.0001 to 12.Og/l and at least an adjuvant selected among at least alkaline soap, chitosan hydrolysate, chitosan hydrolysate added with lecithin, and tannic acid and/or mixtures thereof where at least an adjuvant is assigned to increase the lithium and selenium ions absorption.
