2021's 10 Best L-Theanine
TOP SUPPLEMENTS

Best L-Theanine

From running a business to raising a family, stress is a part of everyday life. But while some stress is normal, it can become debilitating if not managed properly.

One way to help with stress is by supplementing with L-Theanine. It is known a “therapeutic” amino acid because it mainly facilitates relaxation and stimulates stress relief within the body. Let’s take a look at how L-Theanine can help with stress relief and some of its other benefits.

Health benefits of L-Theanine

Stress relief

One of the main reasons for higher stress levels is overactive neurons. GABA (gamma-aminobutyric acid) is the key neurotransmitter, which keeps neuron activity within normal levels and helps you feel calm and relaxed.

There is quite a bit of research that has linked lower GABA levels to stress and anxiety disorders. A 2004 study published in the American Journal of Psychiatry concludes/d that sub-optimal GABA activity can contribute to magnified panic attacks. L-Theanine helps boost GABA levels. (See Reference 1)

Sleep quality

Quality of sleep is just as important as the number of hours you get to sleep. Uninterrupted sleep of 6 hours is a lot better than restlessly tossing and turning the entire night. From weak mental focus to compromised physical coordination and unwanted weight gain, a lot can go wrong if your body is consistently deprived of quality shuteye. (See Reference 2)

Animal and human research has repeatedly shed light on how L-theanine can play a vital role in improving sleep quality. (See Reference 4)

Although many people consume caffeine to get started, overdependence can lead to disturbed sleep patterns. An animal study published in 2012 concluded that small doses of L-theanine can mitigate caffeine-related sleep disturbance. (See Reference 3) Mice were administered a saline caffeine solution, and then they were given a dose of 37.5 mg/kg of L-Theanine, which seemed to reduce their wakefulness.

Mental focus

There are plenty of products currently available that promise significantly improved focus and cognitive function. While some of them may be effective, many unfortunately have an ingredient profile with weak scientific data behind it.

That’s not the case with L-Theanine, as there’s quite a bit of empirical evidence that supports L-theanine’s positive impact on human cognitive function. (See Reference 5)

For instance, a study conducted with over 40 young adults shows how even a small dose of L-Theanine can noticeably improve certain aspects of cognitive function. The subjects were given a combination of 97mg L-theanine and 40mg caffeine. Parameters such as the ability to focus, alertness, blood pressure, and heart rate were observed at before and after 70 minutes of taking L-Theanine.

A remarkable uptick was recorded in the subjects’ focus and heart rate while handling several tasks. The participants also reported feeling more alert after taking the L-Theanine and caffeine mixture. (See Reference 6)

One research paper discussed the various benefits of L-Theanine. It refers to a Japanese study with over 3000 women who regularly consumed green tea. It was observed that L-Theanine can improve alertness in as little as 30 minutes.

Immune system

From recurrent infections to stunted growth, a weak immune system is the root cause of numerous health problems. Genetics aside, nutrient sufficiency is also important for a strong immune system. L-Theanine has been known to facilitate a robust immune system. (See Reference 7)

A year-long study was carried out with over 40 surgery patients. They were given a combination of 208 mg of L-Theanine and 700mg of Cystinefor 9 days – 4 days before the procedure and 5 days after. It was found that L-Theanine helped in keeping inflammation under control after surgery. (See Reference 9)

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. (See Reference 10)

In 2019, a study was conducted with the members of the Polish Rowing Team. They were asked to perform a 2000-meter session on a rowing machine and put on a 6-week supplementation regime of 150mg L-Theanine extract. After the trial, it was concluded that L-Theanine supplementation can restore the body’s Th1/Th2 balance, enabling a robust immune response after intense physical exertion. (See Reference 8)


2021's 10 Best L-Theanine
TOP SUPPLEMENTS

Our list of the top 10 L-theanine supplements is organized to reflect what you most value in your supplements. First and foremost is quality. All ten of these top ten supplements meet high standards of quality and come from brands with a proven record in excellence and purity. Another important factor in deciding the top ten was cost. You don’t have to pay through the nose to get a high quality supplement. In addition, all the companies represented on our top ten list have stellar records with customer service and prompt shipping to ensure that your supplement experience is enjoyable from the first click to your final dose.

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!
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*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.

  • 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.
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*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.

  • 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^).
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*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.

  • 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
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*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.

  • 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
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*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.

  • QUALITY - Professionally manufactured in a cGMP registered facility in USA and thoroughly tested
  • AUTHENTIC - Expertly formulated without any chemical preservatives or unnecessary filler ingredients
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*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.

  • 90 capsules, a three month supply (taken daily at listed serving size)
  • 100 mg L-theanine per serving (1 capsule)
  • No artificial colors, no artificial flavors
  • No gluten, no lactose
  • Satisfaction Guarantee: We’re proud of our products
  • An Amazon brand
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*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.

  • 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.
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*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.

  • 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
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*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.

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