Supplement stacks / St Johns Wort + L-Tryptophan
Can You Take St Johns Wort with L-Tryptophan?
St Johns Wort and L-Tryptophan: one interaction flagged, scored 3/10 (high risk). The count and score come from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice.
Safety at a glance
This score comes from an AI-written analysis of the pair. Our interaction rules check it and can only make it stricter, never milder. Informational only: it can't account for your medications, conditions, or genetics.
What the AI-written analysis says
St. John's Wort and L-Tryptophan may interact due to their effects on serotonin levels. While both supplements are commonly used for mood enhancement, combining them could theoretically increase the risk of serotonin syndrome, especially if taken with other serotonergic medications. Caution is advised, and consultation with a healthcare provider is recommended before combining these supplements.
Known interactions
St. John's Wort
From the AI-written analysis.
Generally safe for short-term use; may interact with various medications.
Typical dosage: 300-900 mg daily (standardized extract)
- Dry mouth
- Dizziness
- Fatigue
- Gastrointestinal upset
- Consult healthcare provider if taking prescription medications, especially antidepressants.
- May cause photosensitivity.
L-Tryptophan
From the AI-written analysis.
Generally considered safe when taken as directed; however, excessive doses may lead to side effects.
Typical dosage: 500-2000 mg daily
- Nausea
- Dizziness
- Diarrhea
- Fatigue
- Consult healthcare provider if taking antidepressants or other serotonergic drugs.
- Monitor for signs of serotonin syndrome.
Timing
No timing arrangement makes this combination safe — see the warnings above.
Recommendations
- Consult with a healthcare provider before combining L-Tryptophan and St. John's Wort.
- Consider monitoring for any unusual symptoms if combining these supplements.
Watch out for
- Monitor for signs of serotonin syndrome, such as confusion, rapid heart rate, and increased blood pressure.
Frequently asked questions
Can you take St Johns Wort and L-Tryptophan together?
St Johns Wort and L-Tryptophan: one interaction flagged, scored 3/10 (high risk). The count and score come from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice.
What score does the St Johns Wort and L-Tryptophan combination get?
The St Johns Wort and L-Tryptophan combination is scored 3/10 (high risk). The score comes from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice. Always confirm with a healthcare professional.
When should you take St Johns Wort and L-Tryptophan?
No timing arrangement makes this combination safe — see the warnings above.
What should you watch out for when combining St Johns Wort and L-Tryptophan?
Monitor for signs of serotonin syndrome, such as confusion, rapid heart rate, and increased blood pressure.
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Not medical advice
AI-written analysis generated August 11, 2026, checked by our interaction rules · How our analysis works