酵母氨酸（英语：Saccharopine）是赖氨酸的一种代谢中间产物。

酵母氨酸所涉及的反应，由酵母氨酸脱氢酶催化：

赖氨酸 + α-酮戊二酸 ⇌ 酵母氨酸 ⇌ 谷氨酸 + ε-醛赖氨酸

Saccharopine is an intermediate in the metabolism of amino acid lysine. It is a precursor of lysine in the alpha-aminoadipate pathway which occurs in a few lower fungi, the higher fungi, and euglenids. In mammals and higher plants saccharopine is an intermediate in the degradation of lysine, formed by condensation of lysine and alpha-ketoglutarate.