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Life Extension L-Theanine 100 mg 60 Vegetarian Capsules

Life Extension’s L-Theanine supplement contains an amino acid derived from tea. L-Theanine has been shown in several studies to support a healthy stress response and promote a calm, relaxed state of mind.
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European delivery from £4.95
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High-quality theanine supplement

L-Theanine benefits have been known around the world, especially in eastern Asia, for centuries. Although the ancient civilizations may have named L-Theanine differently, they understood and explored the relaxing and calming effects of this compound. Theanine used in our formulation contains only the pure L-Theanine form of this amino acid.

Calming Effects

Theanine is an amino acid found in tea. L-Theanine produces calming effects by favorably modulating several aspects of brain activity. L-Theanine promotes brainwave patterns similar to those associated with meditation and massage. Moreover, L-Theanine modulates the formation of the neurotransmitter gamma amino butyric acid (GABA) which in turn modulates levels of two other neurotransmitters, dopamine and serotonin, that also supports relaxing effects.


Nutritional Information

Ingredients Typical Amount per Serving %RI*
L-Theanine 100 mg  
*Reference Intake
**Reference Intake not established


Microcrystalline cellulose, vegetable cellulose (capsule), silica, vegetable stearate.

Directions of Use

Take one (1) capsule one to four times daily, or as recommended by a healthcare professional.


Food supplements should not be used as a substitute for a varied diet. Do not exceed the stated dosage. Store in a cool, dry place, protected from light and heat. Keep out of sight and reach of children.
Product Questions
About The Brand
About The Brand

At Bigvits, we proudly offer Life Extension's top-quality supplements, meticulously crafted with premium ingredients and backed by scientific research. Their commitment to purity, potency, and product quality aligns perfectly with our mission to support your health goals. With a rich history of innovation and hundreds of millions invested in research, Life Extension is dedicated to helping you lead a healthier life. Explore our selection of Life Extension supplements today and embark on a path to better well-being.

Delivery & Returns

Delivery & returns

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    Same day dispatch on all orders placed before 14:30 (GMT) and free UK delivery on orders over £30

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