5-HTP
Amino Acid4 forms compared ↓
Also known as: 5-HTP (5-Hydroxytryptophan), 5-Hydroxytryptophan, Griffonia extract, Oxitriptan
B
Grade B💊 50-200 mg daily🎯 4 primary uses🔗 2 synergies⚠️ Review warnings
Levels upFitness+50 pts
Overview
Direct serotonin precursor, one step closer than tryptophan. More potent for mood and appetite but requires more caution.
Primary Uses
Mood supportAppetite controlSleepFibromyalgia
Frequently Asked About 5-HTP
How much 5-HTP should I take?
The typical effective range is 100-200 mg evening. Individual needs vary based on age, body weight, diet, and goals — start at the lower end and adjust based on response. Always consult a healthcare provider before starting a new supplement.
When is the best time to take 5-HTP?
Evening for sleep; divided for mood. Consistency matters more than perfect timing — pick a daily anchor (e.g. with breakfast or before bed) and stick with it.
Should I take 5-HTP with food?
With small carb.
What is the best form of 5-HTP?
5-HTP with B6 (Pyridoxal-5-Phosphate) is generally the best-absorbed form (5-HTP paired with the active B6 cofactor it needs to convert to serotonin). Cheaper forms exist but often deliver less usable 5-HTP per dose.
Does 5-HTP interact with medications?
Yes — known interactions include SSRIs, MAOIs, triptans - serious interaction. If you take any prescription medication, talk to your doctor or pharmacist before starting 5-HTP.
What does 5-HTP pair well with?
5-HTP stacks well with EGCG (spares dopamine) and B6 — these combinations either improve absorption or work synergistically toward common goals.
Who should not take 5-HTP?
5-HTP should be avoided or used with caution by people with SSRIs, MAOIs and Carcinoid tumors. Pregnant or breastfeeding women should consult a healthcare provider before use.
Compare Forms
4 formsDifferent chemical forms vary in absorption, side effects, and best use cases. Higher bioavailability scores indicate better absorption.
5-HTP from Griffonia simplicifolia
HIGH 95Standardized natural extract from West African seed
Best for:Mood supportSleep onsetCarb cravings
💡 Excellent oral absorption. Crosses BBB to convert to serotonin.
✅ Pros
- • Natural source
- • Well-standardized
- • Most common form
⚠️ Cons
- • Don't combine with SSRIs (serotonin syndrome risk)
- • GI upset in some users
📝 Take with B6 (cofactor) for best conversion. Start low — 50 mg evening — to test tolerance.
5-HTP with B6 (Pyridoxal-5-Phosphate)
HIGH 1005-HTP paired with the active B6 cofactor it needs to convert to serotonin
Best for:Mood supportOptimal conversionAnxiety reduction
💡 Same as standard 5-HTP, but B6 ensures the enzymatic conversion to serotonin runs efficiently.
✅ Pros
- • Improved conversion efficiency
- • B6 supports overall neurotransmitter synthesis
⚠️ Cons
- • Slightly more expensive
- • B6 must be P-5-P form, not pyridoxine HCl
📝 Best general-purpose form. Look for 50–100 mg 5-HTP + 5–10 mg P-5-P.
Sustained-Release 5-HTP
HIGH 85Time-release format for steady serotonin support overnight
Best for:Sleep maintenanceSteady mood supportAvoiding peak side effects
💡 Spread over 4-8 hours rather than peaking sharply.
✅ Pros
- • Less GI upset
- • Better for sleep maintenance
- • Avoids serotonin spikes
⚠️ Cons
- • More expensive
- • Lower peak — less acute mood effect
📝 Good for those who get nausea from immediate-release.
L-Tryptophan (Precursor to 5-HTP)
GOOD 70Amino acid precursor, one step before 5-HTP in the pathway
Best for:General serotonin supportSleepAvoiding GI side effects of 5-HTP
💡 Competes with other amino acids at the BBB — take on empty stomach for best uptake.
✅ Pros
- • Gentler than 5-HTP
- • Multiple downstream uses (niacin, protein synthesis)
⚠️ Cons
- • Slower acting
- • Lower conversion to serotonin
- • BBB transport is gated
📝 Good alternative if 5-HTP causes nausea. 1-2 g typical, on empty stomach.
Dosage
Typical range
50-200 mg daily
Timing
Evening for sleep; divided for mood
With food
With small carb
Dose Tiers
Low
50 mg evening
Moderate
100-200 mg evening
Therapeutic
300-600 mg/day in divided doses
Upper Limit
Don't combine with SSRIs (serotonin syndrome)
Duration
Cycling recommended
Special Populations
Depression (with supervision), sleep
Research & Studies
Search the literature now
We haven’t curated landmark studies for 5-HTPyet — one-click into the primary literature here. PubMed (RCTs) is usually the highest-signal starting point.
Mechanism of Action
- • Directly converts to serotonin
- • Crosses blood-brain barrier
- • Bypasses rate-limiting step
Evidence Quality
Evidence Grade B
Direct serotonin precursor
Safety & Contraindications
Serious Warnings
- • Serotonin syndrome
- • May deplete dopamine long-term
Contraindications
- • SSRIs, MAOIs
- • Carcinoid tumors
Common Side Effects
- • Nausea
- • GI upset
- • Vivid dreams
Pregnancy & Breastfeeding
Avoid
Liver & Kidney Notes
Safe
Interactions
💊 Medications
- • SSRIs, MAOIs, triptans - serious interaction
🧪 Supplements
- • Tryptophan - don't combine
- • Consider EGCG to spare dopamine
🍽️ Food & Alcohol
- • No interactions
Stacking & Synergies
Buying Guide
What to Look For
- • Griffonia simplicifolia source
Standardization Markers
5-HTP content
Adulteration risk
Low
Practical Notes
- • More potent than tryptophan
- • Cycle to prevent dopamine depletion
Tags
amino acidserotoninmoodsleep
Top Products with 5-HTP
Highest-scored catalog products containing 5-HTP, ranked by our scoring engine.
5-HTP (formerly 5-Hydroxytryptophan)Thorne89
5-HTP CapsulesNutricost88
5-HTP PowderNutricost88
Emotion Balance SupportThorne87
Related Guides
In-depth guides covering 5-HTP — protocols, comparisons, and use cases.
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Last reviewed: September 2026 by the Formulate Research Team. Sources cited above; methodology and scoring criteria published here.
Cite this page
Formulate Research Team. (2026, September). 5-HTP — Evidence-Based Supplement Guide. Formulate Supplement Encyclopedia. https://app.formulate-health.app/learning/supplements/5-htp
Educational content based on published research and our scoring methodology. Not medical advice — consult a qualified healthcare provider before starting, stopping, or changing supplements, especially if you take medications, are pregnant, or have a medical condition.