A method for producing a high-zinc-content yeast extract, including extracting the high-zinc-content yeast extract by suspending zinc-containing yeast into a solution containing a carboxylic acid, a carboxylic acid salt, or both thereof to thereby obtain a suspension liquid, and separating a solid component and a liquid component of the suspension liquid； the high-zinc-content yeast extract； food； and an agent for maintaining and restoring a green color of vegetables.本發明係提供一種含高量鋅之酵母萃取物之製造方法，其包含萃取步驟，其係使含有鋅的酵母懸浮於含有羧酸及羧酸鹽之至少任一者的溶液，並將所獲得的懸浮液之固體成分及液體成分加以分離；並提供一種含高量鋅之酵母萃取物、食品及蔬菜之綠色保持復元劑。
