Complex sugars in your dinner are good actually Owen. We need sugar as fuel.
Complex sugars/carbos are not top heavy with glucose or sucrose > Moreover they have a broad spectrum of other sugars too eg, fructose, cellulose, mannose, galactose etc.
It's the sugar cane derivatives that we are concerned about.
Also -vely affecting l-Tryptophan production in the liver are alcohol, recreational drugs, anaesthetics, paints/thinners/varnishes which I may have mentioned before.