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2022's Top 10 L-Theanine Supplements

Find out what to look for in a quality L-Theanine supplement and what to watch out for

What is L-Theanine?

L-theanine is an amino acid found in green and black tea. It is known as a “therapeutic” amino acid because it facilitates relaxation. When paired with caffeine, it may also provide a boost to focus and attention.

Benefits of L-Theanine

✔️ Stress and Anxiety Relief

L-theanine may boost levels of the neurotransmitter GABA. Low levels of GABA have been linked to higher levels of stress and anxiety.

✔️ Improved Sleep Quality

L-theanine can help combat the sleep-hindering effects of caffeine. Caffeine has a half-life of about 5 hours, meaning that if you drink a can of coke (34 mg caffeine) at 6pm, there will still be 17 mg floating around in your system at 11pm. Residual caffeine in the bloodstream can make falling asleep more difficult and cause sleep disruptions.

✔️ Improved Mental Focus

A study conducted with over 40 young adults concluded that even a small dose of L-Theanine can noticeably improve certain aspects of cognitive function. Subjects given a combination of 97mg L-theanine and 40mg caffeine showed improved ability to focus, alertness, blood pressure, and heart rate before and after 70 minutes of taking L-Theanine.

✔️ Fortified Immune System

L-theanine has been shown to bolster immune activity in active individuals. Strenuous physical exercise can often weaken the immune system by disturbing the Th1/Th2 balance – a cellular balance that protects the body from viral and bacterial pathogens. L-theanine restores the body’s Th1/Th2 balance, enabling a robust immune response.

Potential Side Effects

L-theanine is generally considered safe. In a small minority of cases, minor side effects such as nausea, upset stomach, and irritability may occur.

2022's Top 10 L-Theanine Supplements

1. Quality 

All the products we recommend have been third party tested to ensure they meet our high standards of quality.

2. Cost 

Getting your hands on a high quality supplement doesn’t have to break the bank. While our top priority will always be quality, we understand that price factors into many people’s buying decisions.

3. Brand Reputation

To ensure that your buying experience is a pleasant one, we recommend only products from companies with strong reputations for providing quality customer service and prompt shipping.

OVERALL RATING

99%

🥇 TS.com Top Seller!

🥇 TS.com User Top Choice!

Nutricost L-Theanine is the #1 Rated L-Theanine Supplement, as it is high quality and half the price of its competitors. Nutricost L-Theanine is a double-strength formula that offers 200mg of L-Theanine in each capsule. Click Here for Lowest Price

Uniquely, Nutricost is one of the few companies that control the full chain of manufacturing, from sourcing to manufacturing in an FDA-registered facility to warehousing and fulfillment, ensuring strict quality standards are met. Nutricost also offers exceptional customer support for all of its products.

Priced under $11, Nutricost L-Theanine comes with 240 capsules, which is just $.04 per capsule. With Nutricost, you can be assured that this product does NOT contain ANY extra ingredients, fillers, or preservatives.

Nutricost L-Theanine comes with a 120-day, no-questions-asked, money-back guarantee – the best guarantee on the market!

  • #1 L-Theanine supplement
  • Amazon's Choice
  • Only $0.04 per serving
  • 200mg of L-Theanine in each capsule
  • Non-GMO, gluten-free, and made in the USA!
  • No artificial colors, flavors, or chemical preservatives
  • 120-day, no-questions-asked, money-back guarantee!

*Individual Results May Vary - Ratings are based on Society Health Ranking System and do not necessarily reflect typical results from the use of these products. We encourage consumers to research by visiting each product's website for more information.

OVERALL RATING

96%

Amazon Price: $11.97

  • SUPER VALUE – 250 mg of our high quality Pure L-Theanine (no added fillers) and 120 Capsules can give you several months worth of heightened focus.
  • SUPPORTS CLEAR THINKING, FOCUS, AND STRESS RELIEF – L-Theanine is naturally found in Green tea. It can support clear thinking, increase focus levels and help you manage your stress.
  • STACKS WITH CAFFEINE FOR MIND BOOST – Formulated for a perfect combination, stack with our caffeine pills to create a calm focus and heighten cognitive function.
  • 100% SATISFACTION MONEY BACK GUARANTEE - If you're unsure about your purchase and don't see results, we'll refund your money for up to 30 days from purchase.

*Individual Results May Vary - Ratings are based on Society Health Ranking System and do not necessarily reflect typical results from the use of these products. We encourage consumers to research by visiting each product's website for more information.

OVERALL RATING

89%

Amazon Price: $17.95

  • PREMIUM: Features the Award Winning Ingredient Suntheanine, clinically proven to promote an alert state of relaxation without drowsiness, as indicated by an increase in Alpha brain waves *
  • COCONUT OIL: With Organic Virgin Coconut Oil and encapsulated in a Liquid Softgel for faster absorption*
  • QUALITY: Non-GMO and formulated Without Hexane, Gluten, Soy, Artificial Colorings, Stearates Or Titanium Dioxide.*
  • 90-Day Money-Back Guarantee: Your satisfaction means everything to our company. If you're not thrilled with our L-theanine simply return it to us for a refund (See below for details^).

*Individual Results May Vary - Ratings are based on Society Health Ranking System and do not necessarily reflect typical results from the use of these products. We encourage consumers to research by visiting each product's website for more information.

OVERALL RATING

87%

Amazon Price: $17.94

  • Doctor’s Best L-Theanine contains Suntheanine, a pure form of L-Theanine on the market produced via a patented process that mimics the natural process in green tea leaves.
  • L-Theanine helps promote a healthy mood and a restful relaxed state while maintaining daytime alertness
  • L-Theanine supports relaxation and a sense of calm without causing drowsiness or loss of focus. This amino acid found naturally in tea helps support healthy stress response, relaxation, focus and memory
  • L-Theanine is a powerful Amino Acid that enhances cognitive performance and alertness. L-Theanine may help improve quality of sleep, learning performance, concentration and help support the immune system. L-Theanine may also help reduce the negative effects of caffeine
  • L-theanine is an agent that is used for nervousness and tension by supporting mental tranquility. Suntheanine may normalize the body’s stress response and condition the body to handle stressful situations better

*Individual Results May Vary - Ratings are based on Society Health Ranking System and do not necessarily reflect typical results from the use of these products. We encourage consumers to research by visiting each product's website for more information.

OVERALL RATING

83%

Amazon Price: $9.45

  • L-Theanine 200mg promotes relaxation without drowsiness. Also 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

*Individual Results May Vary - Ratings are based on Society Health Ranking System and do not necessarily reflect typical results from the use of these products. We encourage consumers to research by visiting each product's website for more information.

OVERALL RATING

78%

Amazon Price: $14.95

  • QUALITY - Professionally manufactured in a cGMP registered facility in USA and thoroughly tested
  • AUTHENTIC - Expertly formulated without any chemical preservatives or unnecessary filler ingredients
  • HIGH-GRADE - Encapsulated using high-grade vegetable cellulose for optimal absorption & performance
  • SATISFACTION - Enjoy peace of mind with our 180-days (6 months), no questions asked, full refund policy

*Individual Results May Vary - Ratings are based on Society Health Ranking System and do not necessarily reflect typical results from the use of these products. We encourage consumers to research by visiting each product's website for more information.

OVERALL RATING

76%

Amazon Price: $20.40

  • 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: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).
  • Packaged in the USA by a family owned and operated company since 1968.

*Individual Results May Vary - Ratings are based on Society Health Ranking System and do not necessarily reflect typical results from the use of these products. We encourage consumers to research by visiting each product's website for more information.

OVERALL RATING

73%

Amazon Price: $19.99

  • ALERT STATE OF RELAXATION WITHOUT DROWSINESS - LTheanine is an Amino Acid derived from Green Tea that Enhances Mental Clarity & Focus, Helps Moderate Occasional Stress + Anxiety & Helps to Prevent Jitters Caused from Too Much Caffeine Consumption.
  • DON'T SETTLE FOR 200MG L-THEANINE POWDER CAPSULES - Advanced Formula Extra Strength 250mg L-Theanine Liquid Softgels Made With Organic Flaxseed Oil For Superior Absorption & Extra Brain Support.
  • NO BS (Bad Stuff) - Gluten, Corn, Eggs, Milk, Wheat, Peanut, Maltodextrin, Soy, Lactose, Carrageenan, Magnesium Stearate, or Dioxides.
  • SMARTERVITAMINS - We're creating the future of supplements, today.

*Individual Results May Vary - Ratings are based on Society Health Ranking System and do not necessarily reflect typical results from the use of these products. We encourage consumers to research by visiting each product's website for more information.

OVERALL RATING

72%

Amazon Price: $14.99

  • LASTING CALMNESS - L Theanine is known for reducing stress and promoting relaxation without sedation
  • SUPPORTS BRAIN HEALTH - L-Theanine is a powerful Amino Acid that is derived from green & black tea. Many people take L-Theanine supplements to help reduce the negative effects of caffeine. L-Theanine is also taken to help with focus & cognition, promote stress relief and relaxation, may help decrease anxiety, and promote improved sleep quality. *
  • HIGHEST QUALITY FORMULA - Best ingredients available. Manufactured at FDA cGMP certified facility.
  • HIGHLY REGARDED AND RECOGNIZED - Our Products Have Been Consistently Recommended By The Foremost Nutritional Scientists Like Nobel Prize Winner, Dr. Linus Pauling
  • WORKS OR YOUR MONEY BACK We back our products up with a 365-day hassle-free money back guarantee. There's no risk when you order now!

*Individual Results May Vary - Ratings are based on Society Health Ranking System and do not necessarily reflect typical results from the use of these products. We encourage consumers to research by visiting each product's website for more information.

OVERALL RATING

70%

Amazon Price: $12.94

  • L-Theanine Capsules
  • Supports Alpha-Wave Generation
  • A Unique Relaxant Prominent in Tea
  • Exerts protective effects on the brain by mitigating glutamate toxicity

*Individual Results May Vary - Ratings are based on Society Health Ranking System and do not necessarily reflect typical results from the use of these products. We encourage consumers to research by visiting each product's website for more information.

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