Updated: 24 Jun 2026

10 Best organic l theanines of 2026

Explore up to 38% Off

Updated: 24 Jun 2026

#1

Best Choice

MaryRuth's L Theanine 200mg Liquid Drops | L-Theanine + Organic Glycerin | Stress Relief for Adults & Kids | Focus Supplement | Natural Sleep Support | Vegan | Non-GMO | Gluten Free | 30 Servings

9.8

MaryRuth Organics

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Main highlights

Vegan Formula: Per Serving (60 Drops): 200 mg L-Theanine. Other Ingredients: Purified Water, Organic Glycerin, Citric Acid, Natural Flavor, Organic Stevia Leaf Extract, and Potassium Sorbate. Formulated for Adults and Kids.

Multiple Benefits: L-Theanine is an amino acid found primarily in green and black tea and some mushrooms. It promotes relaxation and may ease occasional anxiety and stress while supporting memory and thinking skills (cognitive function).

L-Theanine Liquid Drops: Support stress levels, cognitive function, sleep and more with these delicious, lemon-lime flavored liquid drops. With L-Theanine in easy-to-take liquid form, you can simply take it by mouth, add to a glass of water, your favorite morning juice, or a smoothie!
#2

Best Value

L Theanine 400mg Capsules | 120 Count | Non-GMO & Gluten Free | by Horbaach

9.5

Horbäach

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Main highlights

PROFESSIONAL SOURCING: Our ingredients are carefully selected and tested to ensure strong purity

DYNAMIC SUPPLEMENT: Contains 400 mg of L-Theanine per serving in convenient Quick-Release capsules

AMINO SUPPORT: L-Theanine is a naturally-occurring Amino Acid found in widely touted Green Tea
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#3

Nutricost L-Theanine 120 Capsules

9.3

Nutricost

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Main highlights

Easy To Take Capsules

Double Strength

120 Capsules of 200mg L-Theanine Per Bottle
#4

NOW L-theanine, 100 Mg, 90 Capsules

9.2

NOW

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Main highlights

Supports healthy cardiovascular function through this relaxing effect as well as its antioxidant properties

Promotes relaxation without the drowsiness or negative side effects associated with other calming agents

Amino acid naturally found in green tea
#5

L-Theanine 200mg by Nature's Trove - 120 Vegetarian Capsules

9.0

Natures Trove

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Main highlights

Natural Ingredients - Good Health from the Source!

L-Theanine 200mg may promote relaxation without drowsiness. Also may restores a sense of calm.

Found naturally in green tea
#6

Swisse Ultiboost L-Theanine Calm Mind 50 Capsules

8.7

Swisse

-38%

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Main highlights

Relieve symptoms of stress

Enhance the body’s adaption to stress

Calms the mind

-38%
#7

L-Theanine Plus by Vitaceuticals | Supports Mental Clarity, Relaxation & Stress Relief | Australian Made | 30 Capsules

8.4

Vitaceuticals

-29%

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Main highlights

SUPPORTS MENTAL CLARITY AND BRAIN FUNCTION: Maintain mental clarity and focus with a carefully crafted blend featuring Alphawave, a highly purified and clinically studied form of L-Theanine. Support your brain health and cognitive function for enhanced productivity and better decision-making.

RELIEVES SYMPTOMS OF STRESS AND SUPPORTS EMOTIONAL WELLBEING: Formulated to help relieve stress symptoms, L-Theanine Plus assists the body in adapting to environmental challenges, promoting a healthy stress response and fostering emotional balance.

PROMOTES MIND RELAXATION AND CALMS THE MIND: Experience the soothing benefits of L-Theanine and Inositol, designed to gently calm the mind without causing drowsiness. This advanced formula promotes relaxation, helping you feel more at ease in everyday life while staying focused and alert.

-29%
#8

L-Theanine 400mg Capsules - 60 Capsules - 2 Month Supply

8.3

DEDICAD

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Main highlights

L-Theanine capsules are formulated to provide a reliable addition to your daily routine. A great way to support your health

With carefully selected ingredients, this product supports those who prioritize a balanced lifestyle and value a simple, high-quality supplement that fits into their daily routine

Take 1 L-Theanine Capsules powder pills daily with water & a meal. Convenient 60 days with 1 pack containing 60 counts. Stay healthy and be happy!
#9

L-Theanine 200mg 120 Capsules - Premium Amino Acid - Focus, Clarity & Mind Balance – Clean, Vegan, Non-GMO Capsules – Dietary Supplement by MAYN

8.1

MAYN

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Main highlights

FOCUS & MENTAL CLARITY: Supports focus, alertness and concentration throughout the day — ideal for work, study or general productivity.

BALANCED MIND SUPPORT: Helps maintain a composed and balanced mindset as part of a healthy lifestyle — suitable for busy, active individuals.

200MG PREMIUM L-THEANINE: High-purity amino acid sourced from green tea, formulated at an optimal 200 mg strength for daily cognitive and mental performance support.
#10

Herbs of Gold L-Theanine 200mg - 30 Capsules

8.0

Herbs of Gold

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Main highlights

L-Theanine 200mg supports a healthy stress response in the body and maintains nervous system function.

L-Theanine 200mg contains AlphaWave, a clinically studied*, purified form of theanine shown to increase alpha brain wave activity. Alpha waves are a medium-frequency pattern of brain activity associated with relaxation. Always read the label & follow the directions for use. Read the warnings below before purchase.

L-Theanine 200mg can be taken to calm the mind and relieve symptoms of stress.