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Pure Encapsulations l-Tryptophan

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Enhances serotonin synthesis to support emotional well-being and restful sleep. Ships to the US only.

Enhances serotonin synthesis to support emotional well-being and restful sleep‡
Promotes relaxation and a positive outlook‡
Helps control occasional cravings‡
Contains serotonin precursor and cofactors
Made with high-quality vegetarian ingredients backed by verifiable science


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.6‡


Ages 18 and up
Supports emotional wellness‡
Supports restful sleep and relaxation‡

As a dietary supplement, take 2 capsules, 1-3 times daily, between meals.


Not to be taken by pregnant or lactating women. If you have any health condition or are taking any medication, consult your health professional before use. Do not use concurrently with antidepressants.