NutriStack
5-HTP and Rhodiola Rosea, a caution.
Rhodiola has preclinical monoamine effects, while 5-HTP increases serotonin synthesis. Combined use carries a theoretical serotonin-excess risk, but direct human interaction evidence is limited.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Substances
- 5-HTP and Rhodiola Rosea
- Pair type
- Caution
- Evidence (highest tier)
- Emerging
- Source citations
- 2 sources
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Supplement
- Last verified
- May 30, 2026
Caution · Emerging evidence
Caution
What is happening. Rhodiola has preclinical monoamine effects, while 5-HTP increases serotonin synthesis. Combined use carries a theoretical serotonin-excess risk, but direct human interaction evidence is limited.
Mechanism. Some Rhodiola extracts inhibit MAO-A/MAO-B in vitro, but clinical relevance at supplement doses is uncertain. 5-HTP increases serotonin synthesis, so overlapping monoamine effects justify precaution.
Recommendation. Avoid self-combining Rhodiola with 5-HTP if you also use antidepressants or other serotonergic agents. If used together, keep doses conservative and stop/seek care for serotonin-toxicity symptoms.
Stack Score
How this pair moves the number.
Effect on the composite score
If both 5-HTP and Rhodiola Rosea are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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