Thorne
5-Hydroxytryptophan (5-HTP)
Direct serotonin precursor extracted from Griffonia simplicifolia seed
Approximate price. Subject to merchant changes.
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Reader discount
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- Serving size
- See product label for full directions
- Goal
- sleep
- Category
- Mindful Living
The review
Why we put this on the shelf.
5-HTP bypasses tryptophan's rate-limiting step and converts directly to serotonin in the brain. Used to support mood, sleep onset, and appetite regulation.
We carry 5-Hydroxytryptophan (5-HTP) because Thorne sets a bar most consumer-facing supplement brands don't clear: NSF-certified manufacturing, in-house clinical research with Mayo Clinic and the Mayo Clinic Sports Medicine team, and individual batch testing for purity and potency.
Use the link on this page to get 10% off through our Thorne affiliate partnership. The code applies automatically when you click through — same Thorne, same shipping, just a small kickback to us at no cost to you.
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