L-Theanine is an amino acid primarily found in green tea and even some mushrooms, that improves our stress response, memory and cognitive functioning. L-theanine may help to reduce feelings of anxiety and improve focus and attention. It also reduces fatigue while reducing the feelings of brain fog, supporting optimal performance.
Origin
India
Concerns
- Stress
- Memory Loss
- Brain Fog
- Fatigue
Benefits
Featured in
About
When paired with caffeine, L-Theanine may help to reduce feelings of anxiety and improve focus and attention. This is why many people describe feeling a calm uplift when consuming green tea over other caffeinated beverages such as coffee. L-Theanine improves alertness and reduces fatigue, while reducing the feelings of brain fog.
A review of human studies shows it helps to reduce feelings of stress and anxiety in people experiencing stressful situations.
Another review of recent studies suggests that Green Tea (L-Theanine) may improve attention, working memory, mental flexibility and even self-control.
Furthermore, after four weeks of supplementation with L-Theanine, individuals showed a reduction in sleep disturbances, stress related functions and a significant improvement in cognitive functioning. These findings suggest that it has the potential to support optimal brain health in the general population.
Research and studies
We're led by an evidence-based approach, where each product – and every ingredient – has a purpose. As the science of nutrition evolves, we're constantly learning too.
Journal of Nutrition & Intermediary Metabolism
Theanine consumption, stress and anxiety in human clinical trials: A systematic review
Journal of Medicinal Food
Effects of L-theanine on cognitive function in middle-aged and older subjects: a randomized placebo-controlled study
Nutrients
Effects of L-theanine administration on stress-related symptoms and cognitive functions in healthy adults: a randomized controlled trial
Similar Ingredients

Organic Lion's Mane
Frequently used for its many health benefits including its benefits to the central nervous system.
Learn more
Bacopa
Bacopa is an adaptogenic herb that has been used extensively to support the stress response and a number of brain related concerns.
Learn more
Siberian Ginseng
An adaptogenic herb that supports the body and increases resilience to stress, fatigue and brain fog.
Learn more