Skip to main content

Up to 5% off products when you checkout or sign up


  • Egg free

  • Peanut free

  • Gluten free

  • NSF Certified

  • Vegan

  • Artificial sweetener free

  • Non-GMO

  • Wheat free

  • USP Verified

  • Artificial preservative free

5-Hydroxytryptophan (5-HTP) is an intermediate in the natural synthesis of the essential amino acid, tryptophan, to serotonin. The enzyme tryptophan hydroxylase adds a hydroxyl group (OH) to tryptophan, forming the 5-HTP intermediate. In the body, it converts to serotonin with the removal of a carboxyl group (COOH) by a second enzyme. Serotonin is an important neurotransmitter involved in the regulation of endocrine and brain activity responsible for emotion, appetite and sleep/wake cycles. In clinical studies, administration of 5-HTP supported serotonin production. The 5-HTP supplied in this supplement is derived from the Griffonia simplicifolia plant.*

  • Promotes enhanced serotonin levels*
  • May improve emotional well-being, appetite control and sleep/wake cycles*
  • Made with hypoallergenic, vegan ingredients

Take 1–3 capsules per day, in divided doses, before meals.


Serving Size: One Capsule

Amount Per Serving
5-hydroxytryptophan ... 100mg
(Griffonia simplicifolia)

Other Ingredients: hypoallergenic plant fiber (cellulose), vegetarian capsule (cellulose, water)


WARNING
Not to be taken by pregnant or lactating women. 5-HTP may cause gastrointestinal upset in sensitive individuals

5-HTP 100mg

Pure Encapsulations

$61.99

Sign up for exclusive store pricing

Shop the entire wellness catalog, held to a higher standard

Shop practitioner-grade products, each meeting the same bar for quality through Fullscript's standards.

Powered by
Sign up to shop
  • Verified

    Sourced straight from the brand — no resellers or fakes

  • Enhanced testing

    Select products are tested in-house — get exactly what the label promises

  • Stored and shipped

    From certified facilities, to protect product integrity