Tryptophan decarboxylase (TDC) is a cytosolic enzyme that catalyzes an early step of the terpenoid indole alkaloid biosynthetic pathway by decarboxylation of L-tryptophan to produce the protoalkaloid ...

When tryptophan hits our gut bacteria break it down into byproducts, but what they become depends on where they’re used. “If tryptophan hits our body’s cells, it tends to go get broken down ...

Tryptophan metabolism in the gut In the gastrointestinal tract, tryptophan is broken down into indole, indole lactic acid (ILA), or indole propionic acid (IPA).

We review here the rapid tryptophan depletion (RTD) methodology and its controversial association with depressive relapse. RTD has been used over the past decade to deplete serotonin (5-hydroxy ...

Measured Analytes Nicotinic Acid 2-Picolinic Acid Quinolinic Acid Serotonin Kynurenine 5-OH Tryptophan Tryptophan Tryptamine Indole-3-lactate Indole-3-acetate ...