Best Brands Of L Theanine

Peter | 04-01-2026

You will find our hand-picked selection of Best Brands Of L Theanine below. You have a wide variety of choices of brands such as NOW Foods,Nutricost,Nature Made,Pure Encapsulations available to you as a result of the fact that each one of them has a unique pricing, look, and feel. Continue reading for an in-depth analysis in our Best Brands Of L Theanine buying guide!

Our experts tested a variety of Best Brands Of L Theanine on the market. Right at the top of the list is NOW Foods Best Brands Of L Theanine. Check out some more of our favorites below, and read some valuable insight from our experienced editors.

Editor's Choice
Nature's Trove L-Theanine 200mg 120 Vegetarian Capsules
Nature's Trove L-Theanine 200mg 120 Vegetarian Capsules
Premium Pick
Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free
Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free
Budget Pick
Nature Made Chewable L Theanine 200mg, L-Theanine Supplement for Stress Relief, 50 Chewable Tablets,
Nature Made Chewable L Theanine 200mg, L-Theanine Supplement for Stress Relief, 50 Chewable Tablets,

Top 10 Best Brands Of L Theanine

We researched and compared the top products in the Best Brands Of L Theanine category to provide you with these recommendations.

1. NOW Foods Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 60 Veg Capsules

NOW Foods Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 60 Veg Capsules
8

Now Foods

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  • STRESS MANAGEMENT*/PROMOTES RELAXATION*: Promotes relaxation without the drowsiness or negative side effects associated with other calming agents*
  • HEALTHY VASCULAR FUNCTION*/WITH INOSITOL: Formulation includes inositol, a member of the B-vitamin family that is essential for brain and nervous system health*
  • CLASSIFICATIONS/CERTIFICATIONS: Vegan, Kosher, Non-GMO
  • GMP Quality Assured: A-rated, third-party certification means that every aspect of the NOW manufacturing process has been examined. Our in-house laboratories are ISO/IEC accredited for laboratory testing including for stability, potency and product formulation.
  • Packaged in the USA by a family owned and operated company since 1968

2. NOW Foods Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 120 Veg Capsules

NOW Foods Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 120 Veg Capsules
8.5

Now Foods

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  • STRESS MANAGEMENT*/PROMOTES RELAXATION*: Promotes relaxation without the drowsiness or negative side effects associated with other calming agents*
  • HEALTHY VASCULAR FUNCTION*/WITH INOSITOL: Formulation includes inositol, a member of the B-vitamin family that is essential for brain and nervous system health*
  • CLASSIFICATIONS/CERTIFICATIONS: Vegan, Kosher, Non-GMO
  • GMP Quality Assured: A-rated, third-party certification means that every aspect of the NOW manufacturing process has been examined. Our in-house laboratories are ISO/IEC accredited for laboratory testing including for stability, potency and product formulation.
  • Packaged in the USA by a family owned and operated company since 1968

3. NOW Foods L-Theanine, Double Strength 200 mg Per Cap - 180 Veg Capsules - Enhanced with 100mg

NOW Foods L-Theanine, Double Strength 200 mg Per Cap - 180 Veg Capsules - Enhanced with 100mg
7.7

Now Foods

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  • NOW Foods L-Theanine 200 mg, 180 Veg Capsules
  • STRESS MANAGEMENT - Promotes relaxation without the drowsiness or negative side effects associated with other calming agents.*
  • BONUS - MADE WITH INOSITOL - This premium formulation includes 100 mg of inositol, a member of the B-vitamin family that is essential for brain and nervous system health.* It is sometimes called vitamin B8.
  • GOING GREEN: We are planting 1 tree for every 20 bottles sold of this 180-count size product, up to 5,000 trees per year. Help us make the world a greener place.
  • TRUSTED QUALITY FOR OVER 50 YEARS - Family owned since 1968. Based in the heart of America on solid Midwestern values. NOWs mission is to empower healthier lives by offering top-notch supplements at afforable prices.

4. Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free

Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free
9.5

Nutricost

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  • 120 Capsules of L-Theanine Per Bottle
  • 200mg L-Theanine Per Serving (120 Servings)
  • Easy To Take Capsules
  • Non-GMO, Gluten Free
  • Manufactured In a NSF Certified, GMP Compliant, FDA Registered Facility

5. Nature Made Chewable L Theanine 200mg, L-Theanine Supplement for Stress Relief, 50 Chewable Tablets,

Nature Made Chewable L Theanine 200mg, L-Theanine Supplement for Stress Relief, 50 Chewable Tablets,
9.1

Nature Made

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  • Stress support supplement: contains one 50 count bottle of Nature Made L Theanine 200mg Chewable Tablets for a 50-day supply
  • Works within 30 minutes; L-Theanine helps relax the mind without drowsiness
  • Fast-acting stress relief (1) in chewable tablets that have no color added, no dairy, and are gluten free
  • 100% Drug Free and suitable for vegetarians
  • Delicious tropical fruit flavor; Adults, chew 1 tablet per day as needed
  • #1 Pharmacist Recommended Vitamin & Supplement Brand*; made in the USA with quality global ingredients
  • These statements have not been evaluated by the Food and Drug Administration; this product is not intended to diagnose, treat, cure, or prevent any disease

6. Pure Encapsulations L-Theanine - Amino Acid Supplement to Support Relaxation, Stress & Nervous

Pure Encapsulations L-Theanine - Amino Acid Supplement to Support Relaxation, Stress & Nervous
8.9

Pure Encapsulations

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  • Amino Acid Supplement: Pure Encapsulations L-Theanine is an amino acid supplement for men and women that supports relaxation without causing drowsiness
  • Stress Moderation: This L-Theanine supplement may provide support for occasional nervous tension and irritability, helping to moderate stress
  • Nervous System Support: L-Theanine can support moderation of the effects of caffeine on the central nervous system
  • High-Quality: Formulated using pure ingredients, this L-Theanine supplement is free from unnecessary additives and common allergens
  • Pure Difference: What we leave out matters, too; Pure Encapsulations products are FREE FROM common allergens, artificial or unnecessary ingredients, and GMOs

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

Nature's Trove L-Theanine 200mg 120 Vegetarian Capsules
9.8

Nature's Trove

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  • L-Theanine 200mg may promote relaxation without drowsiness. Also may restores a sense of calm.
  • Found naturally in green tea
  • Natural Ingredients - Good Health from the Source!
  • Made in the USA - GMP NSF Certified Facility - Kosher Certified
  • To SAVE EVEN MORE! Select our SUPER VALUE SIZE - 365 Vegetarian Capsules

8. Integrative Therapeutics L-Theanine - Stress Response Support for Demanding & Busy Lifestyles* -

Integrative Therapeutics L-Theanine - Stress Response Support for Demanding & Busy Lifestyles* -
8.9

Integrative Therapeutics

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  • Workday Stress Response Support*: In a busy and demanding workday, support stress with this capsule that offers relaxation and a healthy stress response*
  • L-Theanine for Stress Support*: Controlled clinical trials have shown that L-theanine can support a healthy stress response*
  • Relaxation Support Supplement*: Adults take 2 capsules one to two times daily for relaxation support*
  • Vegan & Gluten-Free: This dietary supplement is vegan, soy-free dairy-free, gluten-free and doesnt contain wheat, corn, or artificial colors or flavors
  • About Integrative Therapeutics: For over 25 years, patients and clinicians have trusted us for our dedication to quality, potency, and accuracy; transparency around our sourcing and manufacturing processes is part of our quality promise to you

9. Sports Research Double Strength L-Theanine Supplement - Suntheanine Softgels for Focus, Relaxation &

Sports Research Double Strength L-Theanine Supplement - Suntheanine Softgels for Focus, Relaxation &
8.7

Sports Research

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  • ALERT & CALM: L-Theanine, commonly found in the flavonoid herbal green tea, is used as an ayurvedic substitute for those who want the antioxidant benefits of green tea but without caffeine. Encapsulated in a once-daily liquid softgel, our L-Theanine supports feelings of relaxation, calm, focus, and alertness*
  • DOUBLE THE SUPPORT: To optimize your potential and give the utmost support, our L-theanine 200 mg amino acid softgels provide double the amount of L-theanine green tea extract commonly found in energy supplements in a convenient max-strength formula
  • PATENTED SUNTHEANINE: Formulated with patented and clinically researched Suntheanineyou get all of the alertness and relaxation (+ the increase in alpha brain waves) without the jitters or crash of caffeine, energy pills, or energy drinks*
  • PREMIUM INGREDIENTS: We hold all of our supplements to a higher standard. Rest assured that your L-Theanine is crafted using 100% organic coconut oil and an entirely non-GMO verified, gluten-free and soy-free product. Manufactured in the USA in cGMP-compliant facilities
  • THE SPORTS RESEARCH DIFFERENCE: Founded in Southern California in 1980, Sports Research is a family-owned business born from a passion for fitness and wellness. Our goal is to embrace the sport of life through research-backed products created for every bodyinside and out

10. Whole Foods Market, L-Theanine 100 MCG 60 CT

Whole Foods Market, L-Theanine 100 MCG 60 CT
8.9

365 By Whole Foods Market

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  • 60 count L-Theanine supplement
  • 100mg per capsule
  • Supports healthy stress response without drowsiness
  • Premium quality meets rigorous standards

Peter

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