Research statusCatalogued record, not clinically approved.
Citation presence and an automated evidence check are not medical review.
This pair has not completed NutriStack's standalone publication gate. Attached sources may mention one or both substances without establishing the stored interaction type, direction, severity, dose, management advice, or combined safety. The page is excluded from search indexing and must not be used to start, stop, or change treatment.
From the databaseWhat the row says.
Every entry follows the same shape: what is happening, the mechanism, and the recommendation.
Scope
Supplement × Supplement
Last updated
July 13, 2026
SynergyEmerging evidence
What is happening. L-theanine and magnesium are both studied for relaxation-related markers, but direct combination evidence is limited.
Mechanism. L-theanine has alpha-wave and glutamate-signaling research, while magnesium participates in NMDA/GABA-related physiology. Clinical evidence for the specific combination is limited.
Why it matters. Wellness-support pairing only; not anxiety treatment.
Recommendation. If combining L-theanine with magnesium glycinate, keep total supplemental magnesium within 200-350 mg/day elemental magnesium unless clinician-supervised; do not frame the pair as anxiety treatment.
Direction. The effect runs both ways: each one influences the other.
Stack Score
How it moves the number.
Effect on the composite score
No numeric score interpretation is published for this unreviewed pair record.
Stack Score is a NutriStack product heuristic, not a clinical risk or benefit grade. An unreviewed database label must not be treated as a safety or benefit signal. The algorithm is documented at /methodology/stack-score.
SourcesSources, by evidence tier.
Sources attached to the record. Some support an ingredient or mechanism rather than a study of the exact pair; PMIDs link to PubMed where available.
FAQCommon L-Theanine + Magnesium Glycinate questions.
Plain-language answers drawn from the interaction record on this page.
Can I take L-Theanine and Magnesium Glycinate together?
NutriStack catalogs L-Theanine and Magnesium Glycinate as a potential synergy. Confidence depends on whether the sources below study the exact combination. L-theanine and magnesium are both studied for relaxation-related markers, but direct combination evidence is limited.
What kind of interaction is it?
Potential synergy: the stored record proposes a useful combination effect, but the sources and evidence caveats determine whether the exact pair has been tested.
How does this affect a NutriStack Stack Score?
No numeric score interpretation is published for this pair because its stored label has not completed source-level clinical review.
What do the cited sources establish?
NutriStack lists 2 source records with this L-Theanine + Magnesium Glycinate entry. A source may support an ingredient, mechanism, or safety concern without testing the exact pair, so citation presence alone does not prove the visible verdict. Full sourcing methodology is at https://nutristackapp.com/methodology/interactions.
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