CompoAtlas

Théanine in food supplements

862 supplements declared in France contain Théanine as a substance or active ingredient.

Compl'Alim declarations. Compl'Alim, food supplement declarations (France), retrieved 23 October 2026.

What we know about this ingredient

Uses

  • Dietary supplement; food additive (flavor)

  • MEDICATION

PubChem : Hazardous Substances Data Bank (HSDB) · 2026-10-29 · O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Cambridge, UK: Royal Society of Chemistry, 2013., p. 1718; https://pubchem.ncbi.nlm.nih.gov/source/hsdb/8166.

Licence.

A molecule found naturally in plants or organisms; in a supplement it may be extracted from them, made by fermentation or synthesised: the declaration does not say which.

Basis: one CosIngThe European Commission's database of cosmetic ingredients. CAS and natural occurrence recorded in Wikidata (LOTUS database).

Wikidata: names of substances in six languages and taxa in which they occur (largely from the LOTUS database), retrieved 23 October 2026.

Natural occurrence recorded in Wikidata (LOTUS database): 9 taxa; examples: Camellia sinensis, Camellia oleifera, Phaseolus vulgaris, Cleyera japonica, Eurya japonica.

Wikidata: names of substances in six languages and taxa in which they occur (largely from the LOTUS database), retrieved 23 October 2026.

Appearance

  • White crystals from ethanol + water

PubChem : Hazardous Substances Data Bank (HSDB) · 2026-10-29 · O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Cambridge, UK: Royal Society of Chemistry, 2013., p. 1718.

Licence.

Odour described

  • None (no odor)

PubChem : Hazardous Substances Data Bank (HSDB) · 2026-10-29 · FDA; GRAS Assessment of L-Theanine (98%), May 5, 2010. Available from, as of Jan 28, 2014: https://www.accessdata.fda.gov/scripts/fcn/gras_notices/GRN000338.pdf.

Licence.

Stability

  • Product is considered stable and hazardous polymerization will not occur.

PubChem : Hazardous Substances Data Bank (HSDB) · 2026-10-29 · Santa Cruz Biotechnology; Material Safety Data Sheet for L-Theanine, (issue date 10/03/2009). Available from, as of March 18, 2014: https://datasheets.scbt.com/sc-204787.pdf.

Licence.

Taste described

  • Astringent, sweet

  • Slightly sweet

PubChem : Hazardous Substances Data Bank (HSDB) · 2026-10-29 · Kaneko S et al; J Agric Food Chem 54: 2688-2694 (2006); FDA; GRAS Assessment of L-Theanine (98%), May 5, 2010. Available from, as of Jan 28, 2014: https://www.accessdata.fda.gov/scripts/fcn/gras_notices/GRN000338.pdf.

Licence.

Associated research

ClinicalTrials.gov · A trial is not proof: it tests a hypothesis.

Searched on 1 November 2026.

Other names: Theanin (German), Teanina (Spanish), Teanina (Italian).

Wikidata: names of substances in six languages and taxa in which they occur (largely from the LOTUS database), retrieved 23 October 2026.

Same substance in cosmetics: THEANINE.

In plain words

À quoi il sert, selon les fabricants

Objectifs les plus souvent annoncés pour les compléments qui en contiennent (Théanine) : concentration (175 produits), système nerveux (174 produits), sommeil (173 produits), sport (160 produits), humeur (129 produits).

Ce sont les objectifs déclarés par les fabricants à l'administration, pas des effets démontrés. Sur l'emballage, seules les allégations de santé autorisées par l'Union peuvent être écrites.

Compl'Alim, food supplement declarations (France), retrieved 23 October 2026.

What the registers say, country by country

Each line repeats what an official register says on the date it was consulted. Not being in a register means neither allowed nor banned.

Compl'Alim ingredient list (France): listed.

Compl'Alim, reference list of ingredients, retrieved 21 October 2026.

Canada, licensed natural health products (LNHPD): 3 products.

Licensed Natural Health Products Database (LNHPD), Health Canada: licensed products, ingredients, doses, uses and risks, retrieved 27 October 2026.

Contains information licensed under the Open Government Licence – Canada (Health Canada, LNHPD)

Licence du gouvernement ouvert – Canada 2.0 (OGL-Canada 2.0)

United States, supplement labels (DSLD; supplements need no prior approval): 51 products.

Dietary Supplement Label Database (DSLD), US National Institutes of Health: current and off-market labels, retrieved 27 October 2026.

Source: NIH Office of Dietary Supplements, Dietary Supplement Label Database (CC0); US market labels.

Japan, notified foods with function claims: 152 products.

CAA, Japan Foods with Function Claims notifications, retrieved 27 October 2026.

Source: 消費者庁 (CAA), https://www.fld.caa.go.jp/caaks/s/cssc01/. Data processed by CompoAtlas from the official export; this presentation is by CompoAtlas and is not published in this form by the Japanese government. Public Data License 1.0.

Public Data License 1.0 (公共データ利用規約 第1.0版), compatible CC BY 4.0

Declared daily quantities

Declared daily quantities: Théanine
UnitProductsMedianMinimumMaximum
mg38410011,600

Calculated from Compl'Alim declarations that provide a quantity. These are quantities declared by manufacturers, not measurements, and preparation is not distinguished (powder, extract of varying concentration): differences between products can be very large.

Products