A clinically-studied strength of L-theanine shown to support calm, clarity, and adaptive stress resilience without drowsiness* What It Does L-Theanine 200 mg helps promote a calm, focused state of mind without causing drowsiness.* Clinically studied for its ability to enhance alpha-wave brain activity, it supports relaxation while improving mental clarity and concentration.* Regular use may also help ease the body’s stress response and support quality sleep.* How It Works L-Theanine (as Suntheanine®): A pure, patented form of the amino acid found green tea that helps modulate neurotransmitters such as GABA, serotonin, and dopamine to promote relaxation and balanced mood.* [1-3] Encourages alpha-wave activity in the brain, associated with a calm yet alert mental state.* [1][2] Helps reduce the physiological effects of stress while maintaining optimal focus and cognitive performance.* [3-5] Supports relaxation during the day and smoother transition to restful sleep at night.* [4][5] Who It’s For Ideal for individuals seeking support for calm focus, improved stress response, or better sleep quality—whether for managing daily demands, improving concentration, or promoting emotional balance.* Special Features Features Suntheanine®, the clinically researched and patented form of L-Theanine known for purity, consistency, and reliable efficacy.* Non-habit forming and free of caffeine and gluten.* References 1. Williams JL, et al. Plant Foods Hum Nutr. 2020;75(1):12–23. 2. Nobre AC, et al. Asia Pac J Clin Nutr. 2008;17(Suppl 1):167-168. 3. Kimura K, et al. Biol Psychol. 2007;74(1):39-45. 4. Lyon MR, et al. Altern Med Rev. 2011;16(4):348-54. 5. Hidese S, et al. Nutrients. 2019;11(10):2362. doi:10.3390/nu11102362
Serving size: 1 Capsule
Servings per container: 90

Ingredient

Quantity


Glycine

200 mg

Suntheanine

200 mg


Other Ingredients: vegetarian cellulose capsule.

Gluten free
Dairy free
Egg free
Tree nut free

Suggested Use: One (1) capsule daily, or as directed by a healthcare professional. Best taken between meals. 

Serving Size: 1 capsule

Amount Per Serving
L-Theanine … 200 mg
(Suntheanine®)
Glycine … 200 mg

Other Ingredients: vegetarian cellulose capsule.

Suntheanine® is a registered trademark of Taiyo International, Inc. 

Caution: Pregnant or lactating women, consult your healthcare professional before taking this product. Keep tightly closed in a cool, dry place, out of reach of children.

L-Theanine 200 mg

Emerson Item Code

MEP019

Vendor Item Code

00820

Sign in to see pricing and more details

FREE Shipping on orders over $250.00!

Questions? Visit our Help Center or contact our support team: , Email or Call 800-654-4432

Call and Chat available

M-F 9:00 AM - 8:00 PM EST