How to Take L-Tryptophan for Sleep?
Take L-tryptophan on an empty stomach, 30 to 60 minutes before bed. Standard doses range from 500mg to 2g. The empty stomach part is not optional, it is a functional requirement, because other amino acids compete directly with tryptophan for the same absorption pathway.
L-tryptophan is an amino acid that your body converts to 5-HTP, then to serotonin, and finally to melatonin. That conversion chain is the reason it supports sleep, and it is also why timing matters. Competing amino acids from protein-containing food significantly reduce how much tryptophan reaches the brain. Taking L-tryptophan at least two hours after your last protein-containing meal produces meaningfully better results than taking it with food.
Vitamin B6 is a required cofactor in the enzyme that converts 5-HTP to serotonin. Sleep supplements that include B6 alongside tryptophan produce more efficient conversion. If you are taking L-tryptophan as a standalone supplement, pairing it with a B6 source improves the outcome. Sleep supplements that combine tryptophan, B6, and a cannabinoid like CBD or THC in a single formula are designed around exactly this logic.