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Theanine 200 mg

Jarrow Formulas
4.7
★ ★ ★ ★ ★
(6047 ratings)
Theanine 200 mg
Product Image
Score96

A high-potency 200 mg theanine supplement for robust mental calm and cognitive resilience.

How scoring works
Quantity:60 Veggie Cap(s) • (60 servings)
Goals:
Brain Health
Cognitive Support
Sleep Support
Stress Relief
Mental Focus
Productivity Boost
Mood Support

Score 96

A high-potency 200 mg theanine supplement for robust mental calm and cognitive resilience.

How scoring works

Also available as

1 option
100.00mg • 60 Veggie Cap(s) servings Theanine 100 mg • 60 Veggie Cap(s) • 60 servings $10.00 ($0.16 per serving)
$20.99($0.34 per serving)
Vitacost
$ 25.37
Walmart
$ 27.93
Pure Formulas
$ 20.99
Daily Vita
$ 20.99
iHerb
$ 26.60
Amazon
$ 20.99
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Analysis

At 200 mg per serving, this supplement aligns with the higher levels used in research to support relaxation and a steady mood. It is particularly helpful for managing the cognitive fatigue that comes from a long, stressful day.

The single-ingredient focus ensures you are getting exactly what you need without extra fillers. It fits perfectly into a nighttime routine or a high-pressure workday stack.

Pros

  • Clinical-strength 200 mg dose
  • Supports deeper relaxation
  • Vegetarian-friendly capsules
  • Highly regarded for purity

Cons

  • Higher cost than the 100 mg version
  • May be too relaxing for some during the day

Warnings

  • Test your response before performing complex tasks
  • Store in a cool, dry area

Nutrient quality

95 Highest impact

A clinical 200mg dose of the primary amino acid is provided to effectively support relaxation pathways. The use of a veggie capsule format ensures a clean and widely accessible delivery system.

Ingredient transparency

100 Highest impact

The label clearly identifies the active ingredient and its specific dose per serving. Full transparency regarding serving sizes and non-active components allows for an accurate assessment.

Customer satisfaction

98 Highest impact

Exceptional ratings across a high volume of reviews confirm that the product is effective and reliable. Users consistently mention success with using it for relaxation and focus.

Value for money

91 Highest impact

The price per serving is reasonable for a high-dose amino acid from a reputable brand. It offers a strong balance of high-quality material and accessible cost for regular users.

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Goals

Brain Health
Impact
Highest effect
A+ Goal FitA+ Strength of SupportC+ CoverageA+ Formula Quality

L-Theanine at 200mg supports brain health by enhancing alpha brain wave production for deeper relaxation and mental clarity. This high-potency serving appears well aligned with goals for significant stress management and sleep support.

Pure L-isomer form ensures maximum biological activity for modulating inhibitory neurotransmitters. Concentrated 200mg dose provides clinical-strength support in a clean, single-capsule format.

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Cognitive Support
Impact
Highest effect
A+ Goal FitA+ Strength of SupportC CoverageA+ Formula Quality

L-Theanine 200 mg delivers a robust dose of this amino acid that may contribute to improved focus and relaxation. By promoting alpha brain waves, it helps maintain mental clarity during stressful tasks.

This high-potency formulation utilizes the active L-isomer for optimal biological response. It provides exceptional depth for individuals looking to support a calm but alert cognitive state.

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Sleep Support
Impact
Highest effect
A Goal FitA+ Strength of SupportB- CoverageA+ Formula Quality

L-theanine is provided as a potent 200 mg dose to assist with mental relaxation and preparing the mind for rest. This amino acid support appears well aligned with inducing a state of calm before bedtime.

A substantial 200 mg dose matches clinical targets for effective relaxation and alpha wave support. The focused design provides high depth for one pathway without the interference of other calming agents.

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Stress Relief
Impact
Highest effect
A+ Goal FitA Strength of SupportC CoverageA+ Formula Quality

L-Theanine is provided at a therapeutic dose to support a state of relaxed alertness and neurological calm. As an amino acid, it assist in promoting alpha brain wave activity, which is directly linked to mental focus and a reduced psychological response to stress.

The 200mg dose per capsule aligns with clinical standards for maximizing the calming effects of the amino acid. This clean and focused formulation is excellently suited for individuals seeking a high-potency, targeted tool for managing the pressures of a demanding lifestyle.

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Mental Focus
Impact
Highest effect
A Goal FitA+ Strength of SupportC CoverageA+ Formula Quality

L-Theanine at a 200mg dose provides a clinically relevant amount for promoting a calm and focused state of mind. By facilitating alpha brain wave production, it may contribute to better concentration and stress resilience during mental tasks.

This single-ingredient formula is highly streamlined and avoids the use of stimulants or redundant additives. The inclusion of the biologically active L-isomer ensures the intended cognitive benefits are delivered efficiently.

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Productivity Boost
Impact
Highest effect
A+ Goal FitA Strength of SupportC- CoverageA+ Formula Quality

This high-potency L-Theanine supplement provides 200mg to support a state of alert wakefulness and reduced stress. The specific L-isomer format appears well aligned for maximizing neurological activity.

This formulation is particularly effective for balancing the effects of caffeine or managing high-pressure workloads. It offers a clean and potent dose for sustained mental clarity.

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Mood Support
Impact
Highest effect
A- Goal FitA+ Strength of SupportC+ CoverageA+ Formula Quality

A focused dose of L-Theanine supports the regulation of relaxation responses and mental clarity. This single-ingredient approach provides meaningful strength for a primary stress-modulation mechanism.

The 200mg dosage appears well aligned with the levels used in clinical studies to achieve significant calming effects. By modulating brain wave activity, this supplement supports a stable and balanced mood throughout the day.

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Ingredients

IngredientAmount per serving
L-Theanine
200 mg
Gluten Free Adults 18–50 Vegan Dairy Free Vegetarian
Report overview
Theanine · 200 mg OverallScore88
B+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyB+ Value
A higher-potency single-ingredient supplement that delivers 200mg of L-Theanine for deeper relaxation support. It is designed for individuals who require a more substantial dose to manage daily stress levels.
View ingredientView products
97 Value

L-Theanine 100 mg

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98 Value

Double Strength L-Theanine 200 mg

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L-Theanine 200 mg Double Strength

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Suntheanine L-Theanine 100 mg

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Suntheanine L-Theanine 125 mg

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ZenMind

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L-Theanine 200 mg

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Maintains the clinical 200mg dosage at a lower cost-per-serving, offering excellent economic efficiency for long-term users. It provides straightforward, potent support for managing daily mental tension.
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98 Budget

L-Theanine 200 mg

California Gold Nutrition
4.7
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(15500 ratings)
Offers an identical dose with high transparency and purity at an even more affordable price point. This clean capsule format is perfect for those who want potent relaxation results without high markups.
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97 Budget

Double Strength L-Theanine 200 mg

NOW
4.7
★★★★★
(42165 ratings)
Provides 200mg theanine plus inositol for metabolic and focus support at a highly competitive daily price. It represents a more functional and budget-friendly alternative for composers.
Other sellers (5)
97 Value

L-Theanine 100 mg

California Gold Nutrition
4.7
★★★★★
(23398 ratings)
AlphaWave branded theanine provides professional-grade quality with high standardized purity at a mass-market value. It is an excellent option for users who want high-performance materials for less.
Other sellers (1)
98 Value

Double Strength L-Theanine 200 mg

NOW
4.7
★★★★★
(41779 ratings)
Includes inositol for extra emotional stability and brain health benefits at a highly competitive cost. This combination delivers more functional components per dollar than single-ingredient formulas.
Other sellers (5)
96 Value

L-Theanine 200 mg Double Strength

Swanson
4.7
★★★★★
(500 ratings)
Standardized Suntheanine ensures a high-quality experience for relaxation and mental clarity. It provides clinical-strength theanine with excellent daily cost-efficiency and transparency.
Other sellers (1)
96 Performance

Suntheanine L-Theanine 100 mg

Natural Factors Stress-Relax
4.7
★★★★★
(3623 ratings)
Features 200mg of Suntheanine, which is highly regarded for its purity and standardization in clinical studies. This ensures more predictable and reliable cognitive relaxation than non-branded sources.
Other sellers (2)
95 Performance

Suntheanine L-Theanine 125 mg

Natural Factors Stress-Relax
4.7
★★★★★
(1437 ratings)
Increases the active dose to 250mg of branded Suntheanine, providing superior therapeutic support for stress and sleep. The high potency ensures a deeper level of alert calm.
Other sellers (2)
95 Performance

ZenMind

NutriCology
4.6
★★★★★
(285 ratings)
The synergy between GABA and Suntheanine offers multi-pathway support that is far more effective than theanine alone. This combination provides a more comprehensive neurological response to pressure.
Other sellers (3)
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