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L-théanine pure
Nutridom L-Théanine contient 250 mg de L-théanine pure par capsule, extraite de feuilles de thé vert naturellement décaféinées. Cet acide aminé est reconnu pour ses propriétés relaxantes, favorisant la concentration et la clarté mentale sans provoquer de somnolence.

Calme et concentration à tout moment
Contrairement à d'autres produits relaxants, la L-théanine favorise un état de calme et d'équilibre tout en maintenant la vigilance. Elle est donc idéale pour les étudiants, les professionnels et toute personne recherchant une solution naturelle contre le stress sans perte de concentration ni d'énergie.

Formule propre
Formulé avec des ingrédients 100% végétariens, ce complément alimentaire est sans OGM, sans gluten et sans produits laitiers, ce qui le rend adapté à un large éventail de besoins alimentaires.

Nutridom L-Théanine 250 mg | Relaxation et concentration | 60 gélules végétales

Prix normal $17.99
Prix ​​à l'unité
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Health Canada Licensed Natural Health Product (NPN 80068090)

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L-théanine pure
Nutridom L-Théanine contient 250 mg de L-théanine pure par capsule, extraite de feuilles de thé vert naturellement décaféinées. Cet acide aminé est reconnu pour ses propriétés relaxantes, favorisant la concentration et la clarté mentale sans provoquer de somnolence.

Calme et concentration à tout moment
Contrairement à d'autres produits relaxants, la L-théanine favorise un état de calme et d'équilibre tout en maintenant la vigilance. Elle est donc idéale pour les étudiants, les professionnels et toute personne recherchant une solution naturelle contre le stress sans perte de concentration ni d'énergie.

Formule propre
Formulé avec des ingrédients 100% végétariens, ce complément alimentaire est sans OGM, sans gluten et sans produits laitiers, ce qui le rend adapté à un large éventail de besoins alimentaires.

Clinical Research

L-Theanine, a Natural Constituent in Tea, and Its Effect on Mental State

Asia Pacific Journal of Clinical Nutrition, 2008

Randomized, placebo controlled study using EEG to measure the effects of L-Theanine on brain wave activity and mental state in healthy adults. Results demonstrated a significant increase in alpha brain wave activity (8–13 Hz) in the occipital and parietal regions within 30–60 minutes of L-Theanine ingestion compared to placebo. Alpha waves are associated with relaxed, wakeful alertness calm but mentally present, without drowsiness or sedation. Provides the neurophysiological basis for L-Theanine's ability to promote relaxation without drowsiness

L-Theanine Reduces Psychological and Physiological Stress Responses

Biological Psychology, 2007

Randomized, placebo controlled study examining the effects of L-Theanine on psychological and physiological stress responses in healthy adults. Results showed that L-Theanine significantly attenuated heart rate and salivary immunoglobulin A responses to an acute stress task compared to placebo, and reduced subjective stress scores.

The Combined Effects of L-Theanine and Caffeine on Cognitive Performance and Mood

Nutritional Neuroscience, 2008

Randomized, double blind, placebo controlled crossover study examining the effects of L-Theanine alone, caffeine alone, and their combination on cognitive performance and mood in healthy adults. L-Theanine alone improved speed and accuracy of attention-switching tasks and reduced susceptibility to distracting information compared to placebo. The study provides direct evidence for L-Theanine's independent cognitive performance-supporting effects

Research information is provided for educational purposes and does not replace the product's approved label information.

Frequently Asked Questions

What is L-Theanine and what does it do?

L-Theanine (γ-glutamylethylamide) is a naturally occurring non-protein amino acid found almost exclusively in the leaves ofCamellia sinensis the tea plant. It is the compound responsible for the calm, focused quality of green tea that distinguishes it from other caffeinated beverages. Licensed by Health Canada (NPN 80068090) to help temporarily promote relaxation without drowsiness, help reduce stress, and help support cognitive function. Each capsule provides 250mg of L-Theanine from green tea leaf equivalent to approximately 5–12 cups of brewed green tea, without caffeine.

How does L-Theanine promote relaxation without drowsiness?

L-Theanine's primary neurological mechanism is the promotion of alpha brain wave activity (8–13 Hz) the wave pattern associated with relaxed, wakeful alertness: calm but mentally present, without tension or sedation. Multiple EEG studies have demonstrated that L-Theanine increases alpha wave activity in the occipital and parietal regions within 30–60 minutes of ingestion. Most relaxation compounds produce sedation alongside relaxation by broadly increasing inhibitory neurotransmission. L-Theanine's alpha wave promotion produces a qualitatively different state calm without drowsiness appropriate for daytime use, work, and study.

What are the neurochemical mechanisms of L-Theanine?

L-Theanine influences brain chemistry through four complementary mechanisms. First, glutamate receptor modulation: structurally similar to glutamate, L-Theanine acts as a partial agonist at NMDA receptors and moderates excitatory neurotransmission without fully blocking it. Second, GABA support: L-Theanine increases GABA (gamma-aminobutyric acid) levels, the primary inhibitory neurotransmitter, contributing to calm and relaxation. Third, dopamine modulation: L-Theanine increases dopamine in certain brain regions, supporting motivation, mood, and focused mental state under stress. Fourth, serotonin influence: L-Theanine may also support serotonin levels, contributing to mood balance and emotional resilience.

Why is 250mg considered a high potency dose of L-Theanine?

A standard cup of green tea contains approximately 20–50mg of L-Theanine depending on variety, growing conditions, and brewing method. At 250mg per capsule, one capsule provides the L-Theanine equivalent of approximately 5–12 cups of brewed green tea without caffeine, tannins, or liquid volume. Most L-Theanine supplements on the market contain 100–200mg per capsule. The 250mg dose is at the upper end of commonly available supplemental doses and is consistent with the higher doses used in clinical research on L-Theanine's stress and cognitive effects.

Who should not take L-Theanine 250mg?

Consult a healthcare practitioner before use if you are pregnant or breastfeeding, or if you are taking medications for blood pressure or stimulant medications. L-Theanine may have mild blood pressure lowering effects; individuals taking antihypertensive medications should consult a healthcare provider before use.