100% Customer Satisfaction Guarantee

America's #1 Rated Catalog/Internet Merchant
Based on Customer Satisfaction

Enzymatic Therapy


Swanson $23.59
Retail $49.50 Save 52%
Add To Order
Add to Favorites

Save with Swanson


Recently Viewed Items

Look here for an easy way to
navigate to your previously
viewed products.

In Stock
180 Veg Caps
Gluten Free
  • Take the edge off mounting stress and relax naturally

  • Promotes relaxation without drowsiness

  • Gluten free; vegetarian
L-theanine is a special amino acid -- the same found in green tea -- that helps promote a restful, relaxed state while monitoring daytime alertness. L-theanine is also shown to support healthy blood pressure levels that are already within normal range.

Product Label

Supplement Facts

Serving Size 1 Capsule

  Amount Per Serving %Daily Value
L-Theanine (Suntheanine® brand) 100 mg *

*Daily Value not established.

Other Ingredients: Cellulose, vegetable cellulose (modified cellulose), and magnesium stearate.

Recommendations: 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.

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

Contains no sugar, salt, yeast, wheat, gluten, corn, soy, dairy products, artificial coloring, artificial flavoring, preservatives, or ingredients of animal origin. This product contains natural ingredients; color variations are normal.

Terms and Ingredient Definitions

Enzymatic Therapy L-Theanine Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

L-Theanine 4.7 5 5 7
Great product This product works really well! It helps me when I'm having a stressful day while offering all the benefits of green tea. I used to buy it locally but Swanson offers a much better deal. November 18, 2013
Love this product We have used Enzymatic Therapy L-Theanine for years and truly believe it helps us. We feel much more calm and handle stress much better when using this product. We have recommended it to many friends and relatives with similar results. May 17, 2013
Helps with sleep Great product. Helps my son sleep better and calms him. We have used it for a couple of years. Swanson's price is good also! March 2, 2013
amazing product for me Thank you for offering this product! Enzymatic Therapy's l-theanine gives me relaxed clarity of thought, improved sleep, and stronger overall mental performance in ways nothing else has ever accomplished. I take one every morning and one every night. When extra calming is required (e.g., public speaking, hectic day), an added afternoon dose provides additional support. November 23, 2012
Enzymatic Therapy L-Theanine This is the first time that I could not report a success with one of your products. It might help others with a different condition more, but it didn't help me July 10, 2012
1-6 of 6

7 Leaf Guarantee

Swanson’s 7-Leaf Guarantee

Earning your trust is our first
and only priority.

Top of Page