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Stacking guide

What goes well with 5-HTP?

Evidence-graded stacking partners for 5-HTP. Synergistic and neutral combinations are listed alongside pairings to avoid. Use this to design a deliberate stack rather than experimenting blind.

Combine with caution (3)

  • 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 is a mild MAO-A inhibitor. Combined with 5-HTP it elevates serotonin syndrome risk.

  • Tongkat AliEVIDENCEB

    Southeast Asian root (Eurycoma longifolia) used for testosterone support, stress, and energy.

    Both modulate serotonin. Caution recommended.

  • L-TyrosineEVIDENCEA

    Amino acid precursor to dopamine, norepinephrine, and epinephrine. Effective for cognitive performance under stress.

    Same LAT-1 competition — separate timing.

Avoid stacking (1)

  • L-TryptophanEVIDENCEB

    Essential amino acid precursor to serotonin and melatonin. Used for sleep and mood support.

    Stacks serotonin precursors — risk of serotonin syndrome.

Build a stack: use the Stack Builder with 5-HTP 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.