Community observations, not medical advice.Always speak with a qualified healthcare professional.
supplement × Mental Health

5-HTP for Seasonal Affective Disorder (SAD)

Direct metabolic precursor to serotonin, derived from Griffonia simplicifolia seeds, bypassing the rate-limiting step in serotonin synthesis; must not be combined with SSRIs, MAOIs, or other serotonergic drugs due to serotonin syndrome risk.

-published research: study records
-published research: findings
Not formally gradedcertainty of the research
On this pageOverviewEvidenceCommunity outcomesRelated
Why 5-HTP for Seasonal Affective Disorder (SAD)?

The connection

Depression that follows a seasonal pattern, typically worsening in winter months with reduced sunlight.

Also known as: 5-Hydroxytryptophan, Griffonia simplicifolia

Published research

5-HTP × Seasonal Affective Disorder (SAD): at a glance

Every published result for this pair, extracted and audited.

Published research

5-HTP / Seasonal Affective Disorder (SAD): publication years

What this means: Counts describe research quantity, not treatment effectiveness or certainty.

5-HTP / Seasonal Affective Disorder (SAD): publication years (publications, count)
CategoryPublications (count)
20011
20022
20121
20201
20251
← Zoom out: all evidence for 5-HTPZoom out: compare compounds for Seasonal Affective Disorder (SAD) →
Published research

5-HTP × Seasonal Affective Disorder (SAD): the evidence base

Hand-selected PubMed studies, linked to the originals.

6studies referenced
5journals
2001–2025publication range

Ordered by strength of evidence, then result direction.

01Effects of 5-hydroxytryptophan on distinct types of depression: a systematic review and meta-analysisJavelle F, et al. · Nutrition reviews · 2020PMID 31504850 ↗02Symptomatic treatment of interferon-α-induced depression in hepatitis C: a systematic reviewBaraldi S, et al. · Journal of clinical psychopharmacology · 2012PMID 22722514 ↗03Tryptophan and 5-hydroxytryptophan for depressionShaw K, et al. · The Cochrane database of systematic reviews · 2002PMID 11869656 ↗04Are tryptophan and 5-hydroxytryptophan effective treatments for depression? A meta-analysisShaw K, et al. · The Australian and New Zealand journal of psychiatry · 2002PMID 12169147 ↗05Tryptophan and 5-hydroxytryptophan for depressionShaw K, et al. · The Cochrane database of systematic reviews · 2001PMID 11687048 ↗06The Impact of 5-Hydroxytryptophan Supplementation on Cognitive Function and Mood in Singapore Older Adults: A Randomized Controlled TrialLi S, et al. · Nutrients · 2025PMID 40944161 ↗
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Community experiences

Contributors volunteered; this does not establish treatment effectiveness or population incidence.

Reported changes

No publishable community breakdown is available. This does not establish that no reports exist.

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Important: This page reflects observational, aggregate-only community reporting and independent published research. It is not medical advice, and it does not claim any compound treats, cures, or is effective for any condition. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or treatment.