L-Tryptophan crosses the blood-brain barrier and is converted to 5-HTP and then serotonin, influencing mood, relaxation, and sleep. It also contributes to melatonin production, modulating circadian rhythm.
Used for depression, anxiety, insomnia, PMT, emotional instability, and mood disorders. Also beneficial for appetite regulation and seasonal affective disorder (SAD).
Not used traditionally in isolated form, but tryptophan-rich foods (e.g. turkey, legumes, dairy) were historically associated with calmness and contentment in post-meal states.
Available in capsules or powders, often taken at night. May be combined with B6 and magnesium for serotonin production synergy.
Do not combine with SSRIs, MAO inhibitors, or other serotonergic medications due to risk of serotonin syndrome.
Avoid use with antidepressants or CNS drugs unless under supervision.
