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5-HTP (Mood Dose)

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5-HTP (Mood Dose). Serotonin precursor used for mild depression and migraine.

How it works. Crosses BBB and is decarboxylated to serotonin without competing with LNAA transporters.

What the research supports. 1 graded claims. Strongest: Reduces depressive symptoms (older trials) (moderate).

How much to take. Typical dose: 100–300 mg/day.

Side effects and interactions. 1 medication interaction listed. Serious: Serotonin syndrome risk with SSRIs.

Stacking. Pairs well with Omega-3 (EPA/DHA), Alpha-GPC or CDP-choline.

Common forms. Available as Capsule or softgel, Powder, Sublingual or buccal, Liposomal liquid.

Key studies. 8 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried 5-HTP (Mood Dose). Anecdotes are not medical advice.

5-HTP (Mood Dose). Serotonin precursor used for mild depression and migraine.

Molecular structureC11H12N2O3 · 220.22 g/mol

What it is

Serotonin precursor used for mild depression and migraine.

Food sources

Endogenously produced or biosynthesized moleculeStandardized pharmaceutical- or food-grade supplementCombined with cofactors that improve absorption or activity

Goals

Mood & AnxietyBrain & Cognitive

How it works

Crosses BBB and is decarboxylated to serotonin without competing with LNAA transporters.

Pathways

  • Crosses BBB
  • is decarboxylated to serotonin without competing with LNAA transporters

Effects

  • ↓depressive symptoms (older trials) decreases

What the research supports

Reduces depressive symptoms (older trials)moderate

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
100–300 mg/day
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodWith carbs (mood)
Best formMost evidence is based on the capsule or softgel form.
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Side effects & interactions

Common side effects

  • Nausea
  • GI upset

Serious

  • Serotonin syndrome risk with SSRIs

Medication interactions

SSRIs/MAOIssevere

Risk of serotonin syndrome.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

  • Omega-3 (EPA/DHA)Membrane fluidity and neuronal signaling support.
  • Alpha-GPC or CDP-cholineProvides choline substrate for acetylcholine synthesis.

Common forms

  • Capsule or softgel
  • Powder
  • Sublingual or buccal
  • Liposomal liquid

Key studies

8 studies cited in total.

PubMed: 5-HTP (Mood Dose) — Reduces depressive symptoms ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching 5-HTP (Mood Dose) and "Reduces depressive symptoms". Filter by RCT, meta-analysis, or year on the results page.

PubMed: 5-HTP (Mood Dose) — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching 5-HTP (Mood Dose) and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

PubMed: 5-HTP (Mood Dose) — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching 5-HTP (Mood Dose) and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

Discussion

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