Elthea-100™ 60 Veg Capsules
Suitable for Vegetarians

Hadley Wood Healthcare
Elthea-100™ 60 Veg Capsules
Containing the original SunTheanine™ form of L-theanine
Code 2789

Available stock: 14



For out of stock items why not check our other web shop, click here


• Help to manage stress naturally
• Promote relaxation without drowsiness
• Patented pure form of L-theanine
• Suitable for Vegetarians & Vegans

Hadley Wood's Elthea-100 contains the original Suntheanine™ which is the product of a Japanese manufacturer and is standardised to 99% L-theanine. In a study comparing five other L-theanine supplements, SunTheanine™ was found to be the only one that was nearly pure L-theanine.

L-theanine is an amino acid that we can find naturally in green tea, which seems to have anti-stress, anti-depressant, neuroprotective, and cognitive performance-enhancing properties.

Like a relaxing cup of green tea, L-theanine works really fast as it is easily absorbed and reaches maximum concentration within 30 minutes to 2 hours of intake.

This amino acid fosters a restful, relaxed state without diminishing daytime alertness and promotes calmness and well-being without drowsiness.


One capsule two or three times daily. If additional support is desired, increase to two capsules three times daily, or as directed by your healthcare practitioner.

More Information

PDF icon Effects of L-Theanine on Sleep in ADHD (a scientific paper)
(Adobe Acrobat PDF Document, 924.34kb)

PDF icon UK Fibromyalgia magazine article on L-Theanine, sleep and stress
(Adobe Acrobat PDF Document, 67.43kb)



Amount per 1 capsule: L-Theanine (Suntheanine® brand) 100mg

Contains No sugar, salt, yeast, wheat, gluten, corn, soya, dairy products, artificial colouring, artificial flavouring, preservatives or ingredients of animal origin.

This product contains natural ingredients; colour variations are normal.

Notes: If pregnant, nursing, or taking prescription drugs, consult your healthcare practitioner prior to use.

Suntheanine®, a patented form of L-Theanine, is a trademark of Taiyo International, Inc.



What is L-theanine?
First introduced centuries ago in Southeast Asia, tea has become the most widely consumed beverage worldwide aside from water and it is now cultivated in more than 30 different countries. Extensive research has been conducted on tea, specifically green tea, for its many medicinal properties.

It has been estimated that nearly 65 percent of the adult population has experienced some form of stress or anxiety, and these numbers are on a continual rise due to the busy lifestyles we have adopted. Confronted daily with the stresses of our lives, our jobs, our families, etc., we continue to search for ways to relax and reduce our stress levels.

Recently, much attention has been focused on L-Theanine, a unique amino acid commonly found in green tea. It has been determined that L-Theanine is a derivative of Glutamic Acid which is one of the neurotransmitters found in the brain.

Absorbed in the intestinal brush-border membrane, L-Theanine, due to its fat solubility, is incorporated into the brain via the leucine-preferring transport system of the blood brain barrier. Once absorbed into the brain, L-Theanine exhibits many positive, physiological effects.

In an experiment conducted by Hihehiko Yokogoshi, PhD and Takehiko Terashima, PhD at the Laboratory of Nutritional Biochemistry in Shizuoka, Japan, it was determined that dopamine concentrations in the brain, especially in the striatum, hypothalamus, and hippocampus increased significantly after the administration of L-Theanine. Dopamine, one of the brain’s neurotransmitters, is said to affect human emotion. L-Theanine also increases GABA levels in the brain which leads to a feeling of well-being.

The brain transmits four different categories of brain waves which are determined by frequency: Gamma (g), Theta (q), Alpha (a), and Beta (b). Gamma waves are present during sound sleep and Theta waves indicate dozing or sleeping. While Beta waves are present during an awake, excited state, Alpha waves signify an awake, relaxed state. Because L-Theanine promotes Alpha wave generation in the brain, an awake, alert and relaxed physical and mental condition is achieved which demonstrates Theanine’s effectiveness in stress management.

What makes L-theanine different?
Unlike Kava Kava, Valerian, and St. John’s Wort, L-Theanine does not cause drowsiness or impair a person’s motor skills. Effects of L-Theanine are experienced within 30 minutes of consumption and no drug interactions are known.

Awarded “Best New Product of 2000” at Nutracon, Theanine was approved in 1964 by the Japanese Ministry of Health and Welfare for use in food and is currently available in more than 50 food products including ice cream, candy, beverages and supplements.


  • visa
  • visa verified
  • american express
  • mastercard secure
  • mastercard
  • maestro
  • delta
  • sagepay
  • PayPal Acceptance