L-kynurenine is a kynurenine that has L configuration. It has a role as a human metabolite, a Saccharomyces cerevisiae metabolite and a mouse metabolite. It is a non-proteinogenic L-alpha-amino acid and a kynurenine. It is a conjugate acid of a L-kynureninate. It is an enantiomer of a D-kynurenine. It is a tautomer of a L-kynurenine zwitterion.