Best Rated L Theanine

Peter | 04-01-2026

If you aren’t someone who makes frequent purchases, selecting the best Best Rated L Theanine won’t be an easy chore for you. However, you shouldn’t be concerned because we have provided you with the most comprehensive list possible of the top Best Rated L Theanine. Have a look at the products on our list, and pick the ones that appeal to you the most.

We researched and tested Best Rated L Theanine in the market to get you this list. Our most recommended product is Nutricost Best Rated L Theanine. Check out our picks for all of our favorites, and be sure to read our buying guide to get all the information you need to make the best choice!

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 Rated L Theanine

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

1. 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

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. 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

4. 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

5. 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

6. 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

7. 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

8. Nature's Trove L-Theanine 200mg Super Value Size - 365 Vegetarian Capsules

Nature's Trove L-Theanine 200mg Super Value Size - 365 Vegetarian Capsules
8.3

Nature's Trove

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  • SUPER VALUE SIZE - 365 Vegetarian Capsules
  • L-Theanine 200mg may promote relaxation without drowsiness - May restore 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

9. 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.

10. L Theanine 400 mg | L-Theanine Stress Relief | Extra Strength Supplement | Made in USA | Relaxation,

L Theanine 400 mg | L-Theanine Stress Relief | Extra Strength Supplement | Made in USA | Relaxation,
7.7

Nutraharmony

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  • L Theanine Supplement Dont stress & do your best! Sleep well with l theanine 400mg! Provides calming & relaxing effect on the body, supports good sleep, and the ability to deal with stress.
  • Calm, Sleep & Relax L theanine works by encouraging brain-wave activity, which improves concentration by reducing distractions and promoting a more focused state of mind
  • 100% Natural Source L Theanine effectively relaxes and relieves mental and physical tension. It has a natural ability to deal with nervousness and stress-related sleep problems. Found and made from the purest, highest quality green tea!
  • Made in the USA L theanine from NUTRAHARMONY does not contain GMOs; it's dairy-free, gluten-free, nut-free, wheat-free, soy-free, nightshade-free, and sugar-free. L-theanine is a perfect addition to your gluten-free & vegan lifestyle with advanced support and significant effects
  • Quality Matters NUTRAHARMONY ltheanine vitamin is an excellent and effortless choice for improving your health. If you want to share your experience or have questions about l- theanine, message us. Our support team works 24/7. Maintain your health anytime, anywhere with a ltheanine supplement!

Peter

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