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L-Theanine is an analog of the proteinogenic amino acids L-Glutamine and L-glutamic acid. L-Theanine supports relaxation, and maintains mental clarity. It also promotes cardiovascular health and encourages normal circadian rhythms. *

  • Induce Relaxation *
  • Improve Brain Function *
  • Support Cardiovascular Function *
  • Relieve Mental and Physical Stress *
  • Promote Normal Circadian Rhythms *

L-Theanine capsules manufactured by Superior Labs contain 250mg pure L-Theanine with absolutely no magnesium stearate, dioxides, preservatives or other potentially harmful artificial ingredients of any kind. We often sacrifice profits to ensure batches of product remain small and meticulously tested for the utmost quality, potency and efficacy.

Our L-Theanine is formulated, developed and manufactured in an FDA registered and GMP compliant facility for superior quality assurance. Each batch of product is 3rd party tested and certified to ensure utmost safety and efficacy. We often sacrifice profits to ensure we manufacture top quality, industry leading supplements that produce results. We proudly use each product we sell and wholeheartedly recommend them to our friends and family, we wouldn't sell any product that we haven't! 

Discovered in 1949 as a component of green tea, L-Theanine is an amino acid analog of the proteinogenic amino acids L-Glutamine and L-glutamic acid. It was then further isolated from the leaves of the Japanese Gyokuro tree. Traditionally, the leaves were brewed for a green tea known to promote relaxation and mental clarity. It can also be found in specific species of fungus as well as, in small amounts, other plants. For centuries, followers of Chinese traditional medicine have used green tea to promote health; physical and mental. Due to the infrequent presence of L-Theanine in our everyday diet, the western world has difficulty reaching a therapeutic level of L-Theanine.

Because L-Theanine is bioavailable, it has the potential to quickly and efficiently calm the mind and body. However, the efficacy of any supplement is directly related to the harvesting and processing techniques used in the manufacturing of said supplement. At Superior Labs, we hand select our ingredients from partner farms across the U.S. and abroad, where necessary. Optimal growing seasons are taken into account and we ensure each ingredient is free of chemicals and toxins that could reduce the efficacy of our product and adversely affect your health. Our state-of-the-art facility is run by formulary professionals that have decades of experience in the manufacturing of supplements. We manufacture in small batches, ensuring the potency of each batch. That being said, let's talk about the specific benefits our customers report seeing with our L-Theanine supplement:

  • Encourage healthy mood balance
  • Manage feelings of stress
  • Reduction of anxiety 
  • Promote healthy cognitive function
  • Support normal circadian rhythms
  • Encourage a healthy immune function

At Superior Labs, we are committed to the satisfaction and health of our customers. Our purity process ensures each product we produce is free of dangerous chemicals other manufacturers often use to make their base ingredients go farther. We sacrifice profits to ensure each small batch has the correct dosage and potency; consistency is paramount. We are so sure you'll love our L-Theanine, we offer a complete 100% money back guarantee on each and every product we sell. You will get exactly what we promise, in the exact dosage and potency listed on the bottle, or your money back.

We start by harvesting the leaves of the Japanese Gyokuro tree at their peak bioavailability. We then clean and dry each leaf, ensuring they are free of chemicals and unwanted substances. Processing the leaves then becomes of utmost concern. We utilize a combination of traditional recipes and innovative scientific research to bring you the most comprehensive supplement on the market to date. We then package them in the highest quality vegetable capsules, ensuring exact potency. We have tried each of our supplements and would recommend them to our family and friends. 

WHAT YOU WON'T FIND IN OUR PRODUCTS is harmful magnesium stearate, dioxides, preservatives or other potentially harmful artificial ingredients of any kind. This means, you can rest easily knowing you are receiving the safest, most efficient and chemical-free product possible. We are committed to the health of our customers, community and planet. As always, when adding any dietary supplement into your normal routine, we suggest consulting your physician to avoid any drug/herb interaction. 

Choosing Superior Labs L-Theanine will support healthy relaxation and mood stabilization. In this respect, it also promotes healthy circadian rhythms and sleep support. We dedicate our time, energy and money to ensuring you are completely satisfied with each product you purchase from Superior Labs. We know you'll love and feel the difference with each product you purchase just as much as we do! At Superior Labs, we don't recommend any product we haven't personally tested and would recommend to our friends and family.

L-Theanine, Natural Rice Powder, Plant Cellulose (vegetable capsules)

As a dietary supplement, adults take 1 capsule per day or as directed by your healthcare practitioner. Best when taken with a meal.

Do not exceed recommended dosage. Please consult physician if pregnant or nursing, taking medication or have a medical condition before consuming this product. Not intended for use by individuals under the age of 18. Store in a cool, dry place. Do not use if safety seal is damaged or missing. KEEP OUT OF REACH OF CHILDREN.