We Have The Answers You're Looking For

Call Us
888-908-8463  8-5 MST Mon-Fri

Email Us
Send us an email
Need Answers?
Check out our FAQs page
Returning Items
See returning instructions

2018's 10 Best
L-Theanine Supplements

L-Theanine to Promote Relaxation & Reduce Stress

L-Theanine is an amino acid that is not frequently consumed by diet, and is only found in the leaves of Green Tea. Unlike most amino acids, L-Theanine can cross the blood-brain barrier to benefit neurotransmitter function and cognitive health.

L-Theanine acts as an antagonist blocking Glutamate at neural receptors, which promotes a relaxing effect since Glutamate is an excitatory neurotransmitter. L-Theanine also promotes the production of alpha-1 waves which enhances the soothing response, and is necessary for restful sleep.

Our top 10 list of L-Theanine supplements is organized to reflect what you most value in your supplements. First and foremost is quality. All ten of or 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 shake.

#1 - Nutricost L-Theanine

The Standout: High Quality, Low Cost

Nutricost L-Theanine tops the list due to dependable high quality, for a fraction of the cost compared to other top L-Theanine supplements on the market. Each serving contains 200 mg of L-Theanine, which is structurally similar to GABA, a neurotransmitter responsible for calming nervous system activity. With 120 servings per bottle, and each serving equating to 9 cents, Nutricost's L-Theanine is quite a steal.

  • 200 Mg Per Serving
  • 120 Servings Per Bottle
  • 9 Cents Per Serving
  • Promote Relaxation
  • Ensure Quality Sleep

Naturally occurring in Green Tea, L-Theanine is an amino acid that is not commonly consumed through diet. Theanine supplementation crosses the blood-brain barrier, and appears to cause an increase in alpha-1 wave production. which is highly associated with relaxation and attention.

L-Theanine has also been found to help promote peaceful times of rest, by helping calm nervous system activity and stopping ruminating thoughts. Alpha waves are necessary to induce sleep, which L-Theanine helps generate and regulate, to help you fall asleep easier and faster.

With over 100 5-star reviews, it's easy to see why people choose Nutricost L-Theanine as an alternative, non-addictive way to combat anxiety, improve mood, and relaxation.

Keep Reading »

#2 - Source Naturals L-Theanine

The Standout: Trusted Brand, Effective Source Naturals


L-Theanine provides relaxation without sedation and lessened physical stress. Delivering 200 Mg of L-Theanine in every serving, in easy tablet form, Source Natural's L-Theanine is a trust worthy option from a trusted company.

Key Points:

  • 200 Mg L-Theanine
  • 60 Tablets Per Bottle
  • Eases Anxiety
  • Ensures Relaxation

L-Theanine has been shown to reduce levels of circulating corticosterone, which is a standard biomarker of stress, therefor promoting relaxation. L-Theanine can also boost attention and concentration, since L-Theanine is a precursor to the neurotransmitters Dopamine and Serotonin. These neurotransmitters are associated with the functions of working memory, attention span, and the ability to concentrate.

Source Naturals was created in 1982, and boasts a line of more than 600 products. all highly researched, in their highest quality and most bioavailable forms. Source Natural's L-Theanine is no exception, and is a reliable option for those looking to reduce anxiety. Keep Reading »

#3 - Bulksupplements.com L-Theanine

The Standout: Perfect For Stacking

Bulksupplements.com offers a clean and pure powder L-Theanine supplement, providing 250 Mg per scoop, and a whopping 2000 servings per bag. The powder form is perfect for achieving dose control, so you can customize your regimen.

  • 250 Mg Per Serving
  • 2000 Servings Per Bag
  • Enhance Relaxation
  • Increase Alertness

Found in tea leaves and certain species of fungi, L-Theanine is a non-essential amino acid. While most amino acids function to promote protein synthesis for building muscle, Theanine impacts cognitive health, relaxation, healthy sleep, and attention span.

Bulksupplements.com's L-Theanine mixes easily into any beverage, allowing you to create a health regimen that is solely focused on your needs.

Keep Reading »

#4 - Doctors Best Suntheanine

Doctor's Best Suntheanine, a patented pure form of the amino acid L-Theanine. Each serving contains 150 mg of L-Theanine that has been clinically researched and 3rd party tested to help you achieve relaxation without drowsiness as a side effect. Gluten Free, Non-GMO, and Vegan, Doctor's Best Suntheanine is of the utmost quality, designed to help soothe anxiety and promote relaxation.

Keep Reading »

#5 - Jarrow Formulas Theanine

Jarrow Formulas is another highly trusted brand we feel confident recommending. Their L-Theanine formula contains 100 Mg of L-Theanine in every capsule, and supports Alpha-Wave generation for gentle relaxation. Theanine also initiates protective effects on the brain by mitigating Glutamate toxicity. Glutamate is an excitatory neurotransmitter that can cause damage to the brain in high levels. Theanine binds to the same receptors as Glutamate, due to the similarity in structure, which downregulates Glutamate binding and activity.

Keep Reading »

#6 - Country Life L-Theanine

Country Life L-Theanine is certified gluten-free and vegan, while providing the industry standard of 200 Mg patented L-Theanine in every serving. Each bottle contains 60 capsules designed to promote a relaxed and restful state of mind. In addition, each serving is complete with 250% vitamin B6 to help promote absorption for higher bio-availability.

Keep Reading »

#7 - Life Extension L-Theanine

If you're looking for a healthy, safe alternative to easing anxiety, Life Extension's L-Theanine is a top contender. Serving up 100 mg of Suntheanine, a patented L-Theanine formula, Life Extension promotes relaxation, and healthy blood pressure regulation.

Keep Reading »

#8 - NOW L-Theanine

NOW L-Theanine offers up the best for stress management, their L-Theanine formula that contains 200 Mg of L-Theanine, along with 100 Mg of Inositol. Inositol is a member of the B-Vitamin family that is essential for brain and nervous system health. Both work in tandem to promote a quiet, peaceful mind and boosted cognitive function.

Keep Reading »

#9 - Liftmode L-Theanine

LiftMode L-Theanine is a powder formulation of L-Theanine, delivering 200 Mg in every scoop, although dosage can be customized to fit your needs. L-Theanine also works well in conjunction with caffeine, since thhe combined effects allow enhanced concentration, energy, and focus, with the absence of headaches, crashes, and anxiety.

Keep Reading »

#10 - Livelong Nutrition Theanine

L-Theanine is an amino adic that has been shown to ease anxiety, while at the same time sharpening mental faculties, enhancing memory recall and information retention. Livelong Nutrition has formulated a high dosage powder Theanine supplement that contains 500mg of L-Theanine in every scoop, so you can keep calm and sleep soundly.

Keep Reading »

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.

Copyright 2018 © eSupplements.com -- All Rights Reserved