5-HTP
Also known as: 5-Hydroxytryptophan, 5-HTP from Griffonia simplicifolia
The direct serotonin precursor — used for mood support, sleep, and appetite regulation, with faster effects than tryptophan.
What it is
5-HTP (5-hydroxytryptophan) is an intermediate compound produced in the body from the essential amino acid tryptophan during the synthesis of serotonin. It naturally occurs in the seeds of Griffonia simplicifolia, an African plant, which is the commercial source. Unlike tryptophan, 5-HTP crosses the blood-brain barrier efficiently and is converted directly to serotonin by aromatic amino acid decarboxylase — making it a more direct and faster-acting serotonin precursor.
How it works
In the brain, 5-HTP is decarboxylated to serotonin by AADC. Serotonin is then converted to melatonin in the pineal gland at night, connecting 5-HTP to both mood and sleep regulation. By increasing serotonin synthesis, 5-HTP may elevate mood, reduce anxiety, decrease appetite (serotonin modulates satiety signaling), and improve sleep onset. Clinical trials support these applications, though effect sizes are moderate.
Clinical dose range
50–300 mg/day
Start at 50–100 mg and increase gradually. Take with or without food (empty stomach increases brain uptake). For sleep: 100–300 mg 30–45 minutes before bed. For mood: 50–100 mg 2–3 times daily. Should not be used for more than 12 weeks continuously without medical guidance.
Forms comparison
What to look for on the label
- Source disclosed (Griffonia simplicifolia preferred)
- Third-party tested for purity — critical given serious serotonin syndrome risk with impurity 'peak X'
- Dose 50–100 mg per capsule to allow flexible titration
- No combined serotonergic ingredients without clear dose visibility
Health goals supported
Safety & dosing notes
Serious safety concern: NEVER combine 5-HTP with SSRIs, SNRIs, MAOIs, tricyclic antidepressants, St. John's Wort, or tramadol — severe serotonin syndrome risk (potentially life-threatening). Start at 50 mg to assess tolerance. Historical concern about Peak X (a contaminant associated with eosinophilia-myalgia syndrome in tryptophan products) — third-party testing is critical.
SuppsBuddy applies a serious safety flag to 5-HTP products, emphasizing the contraindication with serotonergic medications. Third-party purity testing is treated as a non-negotiable quality marker for this ingredient. Doses above 300 mg/day receive a safety caution.
Frequently asked questions
What is 5-HTP?
5-HTP (5-hydroxytryptophan) is an intermediate compound produced in the body from the essential amino acid tryptophan during the synthesis of serotonin. It naturally occurs in the seeds of Griffonia simplicifolia, an African plant, which is the commercial source. Unlike tryptophan, 5-HTP crosses the blood-brain barrier efficiently and is converted directly to serotonin by aromatic amino acid decarboxylase — making it a more direct and faster-acting serotonin precursor.
How does 5-HTP work?
In the brain, 5-HTP is decarboxylated to serotonin by AADC. Serotonin is then converted to melatonin in the pineal gland at night, connecting 5-HTP to both mood and sleep regulation. By increasing serotonin synthesis, 5-HTP may elevate mood, reduce anxiety, decrease appetite (serotonin modulates satiety signaling), and improve sleep onset. Clinical trials support these applications, though effect sizes are moderate.
What is the typical clinical dose range for 5-HTP?
50–300 mg/day. Start at 50–100 mg and increase gradually. Take with or without food (empty stomach increases brain uptake). For sleep: 100–300 mg 30–45 minutes before bed. For mood: 50–100 mg 2–3 times daily. Should not be used for more than 12 weeks continuously without medical guidance.
What forms of 5-HTP should I look for?
5-HTP from Griffonia simplicifolia extract: Natural source; standardized extract with consistent potency | Synthetic 5-HTP: Chemically identical; no meaningful clinical difference
Is 5-HTP safe?
Serious safety concern: NEVER combine 5-HTP with SSRIs, SNRIs, MAOIs, tricyclic antidepressants, St. John's Wort, or tramadol — severe serotonin syndrome risk (potentially life-threatening). Start at 50 mg to assess tolerance. Historical concern about Peak X (a contaminant associated with eosinophilia-myalgia syndrome in tryptophan products) — third-party testing is critical. This information is educational and is not medical advice.
How does SuppsBuddy evaluate 5-HTP?
SuppsBuddy applies a serious safety flag to 5-HTP products, emphasizing the contraindication with serotonergic medications. Third-party purity testing is treated as a non-negotiable quality marker for this ingredient. Doses above 300 mg/day receive a safety caution.
Related ingredients
This page is for educational purposes only. These statements have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional before starting any supplement.