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Amino Acid

5-HTP (Post-MDMA Replenishment)

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5-HTP (Post-MDMA Replenishment). Serotonin precursor — used post-MDMA to support depleted 5-HT stores. Never combine same-day.

How it works. Crosses BBB and decarboxylates to serotonin, replenishing pre-synaptic pools.

What the research supports. 1 graded claims. Strongest: Reduces post-MDMA 'comedown' mood drop (anecdotal) (anecdotal).

How much to take. Typical dose: 100–200 mg starting 24h after MDMA, evening, for 2–5 days.

Side effects and interactions. 2 medication interactions listed. Serious: Serotonin syndrome if combined with MDMA, SSRIs, or MAOIs.

Stacking. Pairs well with EGCG. Avoid combining with Active MDMA.

Common forms. Available as Free-form crystalline powder, Capsules or tablets, Pre-mixed recovery or hydration beverages, Time-release formulations.

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

Community. Experiences from people who have tried 5-HTP (Post-MDMA Replenishment). Anecdotes are not medical advice.

5-HTP (Post-MDMA Replenishment). Serotonin precursor — used post-MDMA to support depleted 5-HT stores. Never combine same-day.

Molecular structureC11H12N2O3 · 220.22 g/mol

What it is

Serotonin precursor — used post-MDMA to support depleted 5-HT stores. Never combine same-day.

Food sources

Dietary protein from animal sources (meat, fish, eggs, dairy) and plant sources (soy, legumes, grains)Free-form amino acid powders and capsulesTargeted pre-workout, recovery, or sleep formulations

Goals

Post-Drug Use RecoveryMood & Anxiety

How it works

Crosses BBB and decarboxylates to serotonin, replenishing pre-synaptic pools.

Pathways

  • Serotonin synthesis

Effects

  • ↓post-MDMA 'comedown' mood drop (anecdotal) decreases

What the research supports

Reduces post-MDMA 'comedown' mood drop (anecdotal)anecdotal

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
100–200 mg starting 24h after MDMA, evening, for 2–5 days
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodEmpty stomach
Best formMost evidence is based on the free-form crystalline powder form.
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Side effects & interactions

Common side effects

  • Nausea

Serious

  • Serotonin syndrome if combined with MDMA, SSRIs, or MAOIs

Medication interactions

MDMA (same day)severe

Risk of serotonin syndrome — wait minimum 24h after use.

SSRIs/MAOIssevere

Avoid combining.

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

Combines with

Pairs well

  • EGCGSlows 5-HTP peripheral decarboxylation.

Avoid combining

  • Active MDMASerotonin syndrome risk — only use 24h+ after, never before/during.

Common forms

  • Free-form crystalline powder
  • Capsules or tablets
  • Pre-mixed recovery or hydration beverages
  • Time-release formulations

Key studies

8 studies cited in total.

PubMed: 5-HTP (Post-MDMA Replenishment) — Reduces post-MDMA 'comedown' mood drop ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching 5-HTP (Post-MDMA Replenishment) and "Reduces post-MDMA 'comedown' mood drop". Filter by RCT, meta-analysis, or year on the results page.

PubMed: 5-HTP (Post-MDMA Replenishment) — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

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

PubMed: 5-HTP (Post-MDMA Replenishment) — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

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

Discussion

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