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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

Overview

Direct serotonin precursor, one step closer than tryptophan. More potent for mood and appetite but requires more caution.

Primary Uses
Mood supportAppetite controlSleepFibromyalgia

Compare Forms

4 forms

Different chemical forms vary in absorption, side effects, and best use cases. Higher bioavailability scores indicate better absorption.

5-HTP from Griffonia simplicifolia

HIGH 95

Standardized 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 100

5-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 85

Time-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 70

Amino 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

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

Pairs Well With
EGCG (spares dopamine)B6
Avoid Combining With
SSRIsMAOIsTryptophan
Best Goal Synergies
MoodAppetite

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

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.

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Related Guides

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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.