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Suntheanine L-Theanine 100 mg

Natural Factors Stress-Relax
4.7
★ ★ ★ ★ ★
(3644 ratings)
Theanine 200 mg
Product Image
Score95

A premium Suntheanine chewable tablet that provides a robust 200 mg dose for fast-acting mental calm.

How scoring works
Quantity:60 Tablet(s) • (30 servings)
Goals:
Cognitive Support
Mood Support
Sleep Support
Stress Relief
Brain Health
Mental Focus
Productivity Boost

Score 95

A premium Suntheanine chewable tablet that provides a robust 200 mg dose for fast-acting mental calm.

How scoring works

Also available as

1 option
120 servings Theanine 200 mg • 120 Tablet(s) • 60 servings $35.67 ($0.59 per serving)
$18.87($0.62 per serving)
Vitacost
$ 18.87
Pure Formulas
$ 18.87
iHerb
$ 18.87
Amazon
$ 18.87
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Analysis

Suntheanine is the most studied form of L-theanine, ensuring high purity and the correct isomer for brain activity. The 200 mg dose is robust, and the chewable format makes it very convenient to take whenever stress hits.

While it does contain a few calories and some carbohydrates from the tablet base, it is an excellent choice for on-the-go support. It fits best for someone who values branded quality and ease of delivery.

Pros

  • Uses high-purity Suntheanine
  • Convenient chewable tablet
  • Robust 200 mg clinical dose
  • Fast-acting delivery format

Cons

  • Contains 4g of carbohydrates
  • Relatively high price per serving
  • Only 30 servings per bottle

Warnings

  • Contains Xylitol (keep away from dogs)
  • Chew thoroughly before swallowing

Nutrient quality

97 Highest impact

Utilization of Suntheanine ensures maximum isomeric purity and consistent results. The 200mg dose per serving is robust and effective for achieving mental relaxation.

Ingredient transparency

100 Highest impact

Active ingredients and dosages are clearly disclosed with no proprietary blends used. Branded ingredient labeling provides confirmation of the source and quality of the raw material.

Customer satisfaction

96 Highest impact

User ratings are strong across a large volume of reviews, suggesting the product is reliable and effective. Feedback consistently confirms its benefits for mental composure.

Value for money

84 Highest impact

The cost per serving is higher than bulk generic options but fair for a premium branded ingredient. It offers good value for individuals prioritizing verified purity in their supplementation.

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Goals

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

This high-purity L-theanine supplement uses the branded Suntheanine form to ensure maximum effectiveness for calm focus and relaxation. By promoting alpha brain wave activity, it may support concentration without causing unwanted drowsiness.

The 200mg dose is clinically relevant and provides a reliable tool for managing stress-induced cognitive fatigue. It is a premium choice for individuals seeking a focused, single-ingredient amino acid to enhance their productivity.

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

Suntheanine L-Theanine at 200 mg per serving.

Utilizing a premium, patented form of this amino acid supports a state of non-sedative relaxation and calmness.

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

Suntheanine is the sole active ingredient, provided in a 200mg dose for mental relaxation.

Supporting a calm state of mind may contribute to reduced stress before rest and improved sleep latency.

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

Features 200 mg of Suntheanine L-Theanine per serving to support a calm mental state and focused relaxation. Suntheanine is a highly purified, patented form of L-Theanine with extensive clinical validation.

The 200 mg dose is a standard clinical amount for achieving therapeutic stress-relief benefits. This single-ingredient formula offers high depth for neurotransmitter modulation but lacks breadth across other stress pathways.

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

L-theanine, specifically in the branded Suntheanine form, supports focused alertness and relaxation by modulating brain wave activity. This formulation appears well aligned with goals for mental resilience and stress management.

Meaningful dosages of the pure L-isomer ensure that the biological pathways for mental focus are effectively addressed. This focused approach provides high-quality support for maintaining cognitive performance under daily pressure.

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

Suntheanine L-Theanine is provided at a 200mg dose per tablet to support relaxation and a focused mental state. This premium branded form ensures high purity and consistent modulation of alpha brain wave activity.

The supplement focuses on a single, validated pathway for stress-related focus. The ingredients appear well aligned for users seeking to improve concentration without the use of stimulants or sedatives.

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

This supplement provides a clinically studied dose of Suntheanine, a pure form of l-theanine known for inducing a state of relaxed wakefulness. By increasing alpha brain wave activity, it may contribute to improved focus without the jitters often associated with stimulants.

The formulation appears well aligned for individuals seeking mental clarity during stressful tasks. It serves as an excellent foundation for a cognitive stack, particularly when paired with caffeine.

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Ingredients

IngredientAmount per serving
Calories
15 Calorie(s)
Total Carbohydrates
4 Gram(s)
Suntheanine L-Theanine
200 mg
Gluten Free Adults 18–50 Vegan Dairy Free Vegetarian
Report overview
Theanine · 200 mg OverallScore96
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyB+ Value
This supplement uses the premium Suntheanine® form to deliver a reliable dose for stress relief. It is an excellent choice for users looking for high-purity, clinically studied L-Theanine.
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