TK3

**TK3** is an investigational oral nutritional supplement consisting of **L-tryptophan and thymine**. It has been studied as supportive care alongside chemotherapy for patients with advanced cancer, with the intended goals of improving quality of life, reducing chemotherapy-associated toxicities, and improving treatment tolerance. Its specific molecular mechanism and clinical efficacy have not been established. The ClinicalTrials.gov record title calls the components tryptophan and thiamine, but the trial summary and independent academic descriptions identify the composition as tryptophan plus thymine. ([med.agiltrace.com](https://med.agiltrace.com/clinical-trials/NCT03341286))

Other names

L-tryptophan + thymine