5-HTP

Thorne 5-HTP is a serotonin precursor supplement designed to support restful sleep, a balanced mood, and healthy appetite regulation. As 5-Hydroxytryptophan, it bypasses a key rate-limiting step in serotonin synthesis and is well absorbed — even when taken with meals.

The serotonin levels in the body are associated with the regulation of sleep, mood, and appetite. A balanced serotonin level has been shown to support restful sleep, good mood, and decreased sugar cravings.* There are several ways to support a healthy serotonin level. L-tryptophan and 5-Hydroxytryptophan (5-HTP) are both precursors to serotonin. However, supplementation with 5-HTP is preferable, because unlike L-tryptophan, 5-HTP cannot be shunted into other uses in the body, such as niacin or protein production. 5-HTP is well absorbed by the body and easily crosses the blood-brain barrier where it can increase the synthesis of serotonin in the central nervous system.* And 5-HTP can be taken with meals without reducing its effectiveness.*

5-Hydroxytryptophan (5-HTP) is the intermediate metabolite the body produces when it initiates the process of converting the essential amino acid L-tryptophan to serotonin. Therefore, supplementation with 5-HTP will bypass the conversion of L-tryptophan into 5-HTP by the enzyme tryptophan hydroxylase – which is the rate-limiting step in the synthesis of serotonin – and is a conversion that can be inhibited by a number of factors, including stress, insulin resistance, increasing age, and deficiencies of vitamin C, folate, and iron.* 5-HTP is well absorbed when taken orally, with about 70 percent going into the bloodstream.* Intestinal absorption of 5-HTP does not require the presence of a transport molecule, and its absorption is not affected by the presence of other amino acids; therefore, 5-HTP can be taken with meals without reducing its effectiveness. 5-HTP has been shown to have a beneficial impact on mood, sleep, carbohydrate cravings, and discomfort associated with fatigue.* Numerous studies of individuals with negative mood status have shown significant positive response with 50-300 mg of 5-HTP daily.*

To further facilitate serotonin production, Thorne's 5-HTP formula contains pyridoxal 5'-phosphate, the active form of vitamin B6 and the necessary cofactor for the conversion of 5-HTP to serotonin. 5-HTP is commercially produced by extraction from the seeds of the African plant, Griffonia simplicifolia.

Each lot is thoroughly tested for contaminants, including Peak X, and is Peak X free.

Suggested Use:

Take 1-2 capsules three times daily or as recommended by your health-care practitioner.

Warnings:

ALLERGY WARNING

This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients.

PREGNANCY WARNING

If pregnant or nursing, do not use this product.

INTERACTIONS

5-Hydroxytryptophan should be used with caution in an individual currently being treated with an SSRI, MAO inhibitor, or other antidepressant medication.

How Thorne 5-HTP Fits Into a Wellness Routine

• Evening wind-down support: Part of a nightly routine aimed at promoting restful, quality sleep through healthy serotonin balance.
• Mood and emotional balance: Supports stable mood as a direct precursor to serotonin synthesis in the central nervous system.
• Appetite and craving management: Complements nutrition goals by supporting serotonin levels associated with reduced sugar cravings.
• Stress-resilient absorption: Unlike L-tryptophan, 5-HTP bypasses conversion steps that can be inhibited by stress, making it a more direct route to serotonin support.

Frequently Asked Questions

What is Thorne 5-HTP used for?

Thorne 5-HTP is used to support healthy serotonin levels, which are associated with restful sleep, balanced mood, and reduced sugar cravings. It serves as a direct precursor to serotonin in the central nervous system.

What is the difference between 5-HTP and L-tryptophan?

5-HTP is a step closer to serotonin in the body's conversion process, meaning it bypasses the rate-limiting enzyme step that L-tryptophan must go through. Unlike L-tryptophan, 5-HTP cannot be redirected into other pathways such as protein or niacin production.

Can Thorne 5-HTP be taken with food?

Yes — according to Thorne, 5-HTP can be taken with meals without reducing its effectiveness, making it a flexible addition to an existing supplement or wellness routine.