The amino acids 5-hydroxytryptophan (5-HTP) and l-tryptophan are precursors of serotonin. 5-HTP is generally recommended over l-tryptophan because it crosses the blood-brain barrier at a higher rate, ...

A research team presents an overview of recent advances in the microbial biosynthesis of L-tryptophan (L-Trp) and its ...

This review synthesizes progress in pathway optimization, regulatory rewiring, and microbial cell factory design that has ...

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If you’re feeling tired, irritable, have brain fog or trouble sleeping make sure you’re paying attention to tryptophan. This time of year, we usually associate tryptophan with napping after ...