Supplement stacks / St Johns Wort + L-Tryptophan
Can You Take St Johns Wort with L-Tryptophan?
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.
Conservative, AI-assisted reading of publicly available medical sources (NIH, Mayo Clinic, WebMD, Examine.com). Informational only — it can't account for your medications, conditions, or genetics.
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.
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.
Take L-Tryptophan in the evening for sleep support, and St. John's Wort in the morning to align with its energizing effects.
- Consult with a healthcare provider before combining L-Tryptophan and St. John's Wort.
- Consider monitoring for any unusual symptoms if combining these supplements.
- Monitor for signs of serotonin syndrome, such as confusion, rapid heart rate, and increased blood pressure.
Can you take St Johns Wort and L-Tryptophan together?
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.
How safe is the St Johns Wort and L-Tryptophan combination?
Our analysis of publicly available medical sources scores this combination 3/10 (high risk). This is an informational estimate, not medical advice — always confirm with a healthcare professional.
When should you take St Johns Wort and L-Tryptophan?
Take L-Tryptophan in the evening for sleep support, and St. John's Wort in the morning to align with its energizing effects.
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.
Taking more than these two? Run your complete supplement list — plus any medications — through the live checker for a combined analysis.
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Analysis generated August 11, 2026 · Sources include NIH, Mayo Clinic, WebMD, and Examine.com · How our analysis works