What kind of interaction is it?

Synergy: a documented combination effect that is stronger or more useful than either substance taken alone.

Is this interaction backed by published research?

Yes. NutriStack lists 1 citation row for the Gotu Kola + L-Theanine pair, each linking to PubMed by PMID where available. Full sourcing methodology at https://nutristackapp.com/methodology/interactions.

Supplement × Supplement·a synergy·Insufficient evidence

Gotu Kola + L-Theanine

Q: Can I take Gotu Kola and L-Theanine together?

Yes. The combination of Gotu Kola and L-Theanine produces a measurable benefit. Gotu kola has traditional and preliminary use for nervous tension, and L-theanine promotes a calm, alert state. Used together they may provide complementary, gentle relaxation without strong sedation.

Q: How does this affect a NutriStack Stack Score?

+2 to your Stack Score per scored synergy row.

Synergy Insufficient evidence

Gotu kola has traditional and preliminary use for nervous tension, and L-theanine promotes a calm, alert state. Used together they may provide complementary, gentle relaxation without strong sedation.

Supplement × Supplement

Open the interaction checker → Read the methodology

From the database

What the row says.

Every entry follows the same shape: what is happening, the mechanism, and the recommendation.

Substances

Gotu Kola and L-Theanine

Pair type

Synergy

Evidence

Insufficient

Source citations

Scope

Supplement × Supplement

Last verified

June 4, 2026

SynergyInsufficient evidence

What is happening. Gotu kola has traditional and preliminary use for nervous tension, and L-theanine promotes a calm, alert state. Used together they may provide complementary, gentle relaxation without strong sedation.

Mechanism. L-theanine increases alpha brain wave activity and modulates glutamate and GABA signaling; gotu kola may have mild GABAergic and antioxidant calming actions. The two operate through distinct but compatible relaxation pathways.

Recommendation. Reasonable to combine for mild stress support. No dose adjustment or timing separation required. Expect subtle effects; not a treatment for clinical anxiety.

Stack Score

How it moves the number.

Effect on the composite score

If both Gotu Kola and L-Theanine are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).

The full algorithm, the clamping rules, and four worked stacks are at /methodology/stack-score.

Sources

Sources, by evidence tier.

Every claim on this page is cited. PMIDs link straight to PubMed.

Reference material

1Lopresti AL. The Effects of Centella asiatica on Cognitive and Mood States: A Review. Journal of Dietary Supplements. 2022.Needs sourceNo link

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One pair was the worked example.

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Open the interaction checker → Browse the research index