How Much Tryptophan Should I Take for Sleep?
500mg to 1g of L-tryptophan is the common starting range for sleep support. Clinical studies have used doses up to 2g. Starting at 500mg and adjusting upward based on results over several nights is the standard approach.
L-tryptophan does not have a single established clinical dose. The 500mg to 1g range reflects what appears most frequently in sleep supplement formulas and what customers typically start with. At this range, most people notice mild to moderate effects on sleep onset. Doses above 1g are sometimes used for more pronounced effects, but the additional benefit above 1g is not consistent across individuals.
Two variables affect how much you need more than the dose itself. First, whether you take it on an empty stomach: competitive amino acids from food significantly reduce the amount that reaches the brain regardless of dose. Second, whether the formula includes B6: without adequate B6, the conversion from 5-HTP to serotonin is less efficient, making the tryptophan dose less effective. Combination formulas that address both variables typically perform better than high-dose standalone tryptophan products.