L-tryptophan

The essential amino acid l-tryptophan is a serotonin precursor. Research indicates that l-tryptophan supplementation may support emotional well-being and restful sleep.¹ In a double-blind, placebo-controlled study, l-tryptophan supported healthy emotional processing and promoted positive outlook in women.² In a separate study, it supported healthy mood and lessened occasional irritability during the menstrual cycle.³ l-Tryptophan also supports healthy sleep quality, onset and duration.⁴ Additional research suggests that tryptophan may promote relaxation and help control occasional cravings.⁵ Vitamin B₆ provides enhanced support as an important cofactor involved in the metabolism of l-tryptophan.