L-Tryptophan tuaj yeem koom nrog kev rov ua dua tshiab ntawm cov ntshav plasma proteins hauv cov tsiaj, thiab tuaj yeem txhawb lub luag haujlwm ntawm riboflavin, thiab tseem tuaj yeem pab cov synthesis ntawm niacin thiab heme, uas tuaj yeem nce cov tshuaj tiv thaiv kab mob hauv fetuses ntawm cov tsiaj cev xeeb tub, thiab txhawb kev lactation hauv cov nyuj thiab sows thaum lactation. Thaum cov tsiaj nyeg thiab nqaij qaib tsis muaj tryptophan, kev loj hlob stagnation, poob phaus, txo cov rog, cov qe ntshav atrophy hauv cov txiv neej yug me nyuam.