Stacking guide
What goes well with L-Tryptophan?
Evidence-graded stacking partners for L-Tryptophan. Synergistic and neutral combinations are listed alongside pairings to avoid. Use this to design a deliberate stack rather than experimenting blind.
Combine with caution (2)
- Rhodiola RoseaEVIDENCEA
An Arctic adaptogen used for centuries in Siberian, Scandinavian, and Tibetan traditional medicine. The most-evidenced natural intervention for stress-induced mental fatigue and mild depression. Activating, not calming — take in the morning only, otherwise it disrupts sleep.
Rhodiola's mild MAO inhibition can elevate tryptophan-derived serotonin.
- L-TyrosineEVIDENCEA
Amino acid precursor to dopamine, norepinephrine, and epinephrine. Effective for cognitive performance under stress.
Both compete for LAT-1 transport into brain. Take at separate times of day.
Avoid stacking (1)
- 5-HTPEVIDENCEB
Direct serotonin precursor, one step closer than tryptophan. Sourced from Griffonia simplicifolia seeds.
Stacks serotonin precursors — risk of serotonin syndrome.
Build a stack: use the Stack Builder with L-Tryptophan pre-selected, or check any specific pairing in the Interaction Checker.
Stacking guidance reflects curated interaction rules from the published literature, traditional use, and well-characterised mechanisms. Individual response varies; introduce one substance at a time and track effects. Not medical advice — see our disclaimer.