Doctor’s Best
L-Theanine with AlphaWave — 200 mg
60 veggie capsules; 60 servings
The label lists 200 mg L-theanine as AlphaWave per veggie capsule. The bottle contains 60 one-capsule servings.
Read ingredients & context ↗Theanine.
11 product profiles across 8 brands. Compare the selected format, ingredients and evidence before choosing.
Search and filter this category ↗Small stress and sleep trials invite modest expectations
L-theanine is an amino acid found in tea and also sold as a separate supplement. Small human trials have examined stress-related symptoms and aspects of sleep. Tea, isolated theanine and theanine combined with caffeine are different interventions, so the complete formula matters when interpreting research or deciding what effect to expect.
Read the evidence limits and sources
The cited trial was small and short, with results that need replication in broader populations. It does not establish treatment of anxiety disorders or chronic insomnia. Effects of a specific theanine preparation should not be assumed for every capsule, blend or drink, particularly when caffeine is added.
Hidese et al. · L-theanine randomized controlled trial (2019) ↗
Ingredient context reviewed 2026-10-26. General ingredient evidence does not verify the exact branded products below.
Explore theanine products
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Jarrow Formulas
Theanine 100 - 100mg
60 Veggie Capsules — US label
Per 1 capsule: L-Theanine 100mg.
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Jarrow Formulas
Theanine 200 — 200 mg
60 capsules · 200 mg per capsule
Each capsule contains 200 mg L-theanine. The current formula uses a cellulose-based capsule and lists no caffeine.
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Jarrow Formulas
Theanine Gummies
60 Gummies — US label
Per 1 gummy: Calories 5 Total Carbohydrate 3 g Dietary Fiber 2 g Sodium 10 mg L-Theanine 100mg.
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Life Extension
L-Theanine
60 vegetarian capsules; 30 two-capsule servings
The current Supplement Facts panel lists 200 mg AlphaWave L-theanine per two vegetarian capsules, equivalent to 100 mg per capsule. The bottle contains 60 capsules.
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Momentous
L-Theanine — 200 mg
60 capsules · 60 one-capsule servings
Each capsule supplies 200 mg L-theanine. The current 60-capsule bottle lists rice flour, hypromellose, magnesium stearate and silica as other ingredients.
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Natural Factors
Mental Calmness L-Theanine — 125 mg
60 vegetarian capsules
Each capsule supplies 125 mg Suntheanine L-theanine. The Canadian manufacturer daily direction is 2 capsules, giving 250 mg.
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Solgar
L-Theanine — 150 mg
60 vegetable capsules; one-capsule serving
The panel lists 150 mg free-form Suntheanine L-theanine per vegetable capsule. The pictured bottle contains 60 capsules.
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Sports Research
L-Theanine + Caffeine
60 softgels
The manufacturer lists 200 mg L-theanine, 100 mg organic caffeine from green coffee beans and 500 mg coconut MCT oil per softgel.
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Sports Research
L-Theanine with Suntheanine — 200 mg
60 softgels
The manufacturer identifies Suntheanine L-theanine in the selected 200 mg softgel formula.
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Thorne
Theanine 200 mg
90 capsules — US label
Per 1 capsule: L-Theanine 200 mg.
Read ingredients & context ↗Products are arranged alphabetically by brand. Inclusion and ordering do not depend on an affiliate partnership. Check exact pack, seller and Indian delivery separately.