5-HTP

Not medical advice. 5-HTP is discussed here for informational and harm-reduction purposes only. We do not endorse use, and any dosing context is informational, not a protocol.

Also known as	5-hydroxytryptophan, oxitriptan
Category	Nootropic
native_region	Griffonia simplicifolia (African plant source for commercial extraction)
active_compounds	5-hydroxytryptophan (5-HTP) amino acid
US legal status	5-HTP is a lawful dietary supplement under DSHEA. Not FDA-approved for medical use. Available as a supplement derived from seeds of Griffonia simplicifolia.

What is 5-HTP?

A naturally occurring amino acid and direct precursor to serotonin. 5-HTP is derived from the Griffonia seed and is marketed for mood, sleep, and appetite support. It bypasses the tryptophan precursor step.

How it works

5-HTP crosses blood-brain barrier directly and is converted to serotonin by aromatic amino acid decarboxylase (AADC). Acts as direct serotonin precursor, bypassing tryptophan and 5-HTP pathway steps.

Background & history

Extracted from Griffonia simplicifolia seeds beginning in 1980s. Promoted in Europe and Asia for mood and sleep. Modern US supplementation expanded in 1990s-2000s.

What the research says

Moderate evidence from small clinical trials for 5-HTP in supporting mood and sleep. Some evidence for appetite and weight management support. Variable individual efficacy. Long-term safety in humans less established than L-tryptophan.

Reported effects

Reported to support mood and emotional wellness
Studied for sleep quality improvement
May support appetite and satiety
Anecdotal reports of reduced anxiety
Potential cognitive relaxation support

Dosing & administration (informational)

Typical supplemental dose 50-100 mg three times daily (150-300 mg total) for mood or sleep. Start low and titrate; consult healthcare provider for individual needs.

This is general research/context information, not medical advice or a recommended protocol.

Safety & side effects

Risk of serotonin syndrome when combined with SSRIs, SNRIs, MAOIs, tramadol, or other serotonergic agents
Common side effects: nausea, diarrhea, drowsiness
Rare: vivid dreams, headache, blurred vision
Not recommended in pregnancy/breastfeeding
Avoid if taking St. John's Wort, L-tryptophan, or other serotonergic supplements

Drug & supplement interactions

MAJOR: Serotonin syndrome risk with SSRIs, SNRIs, MAOIs, tramadol
Risk with other serotonergic supplements (L-tryptophan, St. John's Wort)
Possible interaction with carbidopa or benserazide
Safe with most non-serotonergic medications

Who should avoid it

All serotonergic antidepressants (SSRIs, SNRIs, MAOIs)
Tramadol and other serotonergic pain medications
Other serotonergic supplements (L-tryptophan, St. John's Wort)
Pregnancy and breastfeeding

How it is commonly combined

Do NOT combine with serotonergic herbs or supplements without medical supervision; not recommended with L-tryptophan.

Legal & regulatory. 5-HTP is a lawful dietary supplement under DSHEA. Not FDA-approved for medical use. Available as a supplement derived from seeds of Griffonia simplicifolia.

Quality & harm reduction

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Lab testing & harm-reduction tools

If you are going to research a compound, verifying identity and purity is the single most protective step. Independent analytical testing and sterile-handling supplies reduce risk.

Compare testing options

Frequently asked questions

How is 5-HTP different from L-tryptophan?

5-HTP is a direct serotonin precursor, while L-tryptophan is a more upstream precursor. 5-HTP bypasses conversion steps and may act faster in some users.

Can I take 5-HTP with my SSRI?

Significant serotonin syndrome risk. Do not combine with SSRIs, SNRIs, or other serotonergic drugs without medical supervision.

Will 5-HTP help my appetite?

Some small studies suggest appetite-reducing effects in certain contexts. Evidence is not strong enough for weight management claims.

Does 5-HTP cause nausea?

Nausea is a common initial side effect in some users; often diminishes with continued use or lower dosing. Take with food if sensitive.

How long does 5-HTP take to work?

Effects may appear within days to weeks; chronic use optimizes serotonin synthesis and mood effects.