Ingredient

L- Theanine

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Source

Not animal-derived

Allergen

Role in food

L-theanine is added to foods and beverages for its potential to promote relaxation without …

What it is

L-theanine is an amino acid found naturally in tea leaves. It is also produced synthetically for use as a food ingredient. It is often found in supplements and beverages.

Why it's used

L-theanine is added to foods and beverages for its potential to promote relaxation without drowsiness. It is most commonly found in energy drinks, teas, and other beverages.

Health notes

In the U.S., L-theanine is generally recognized as safe (GRAS) by the FDA for use in certain foods. Research suggests it may promote relaxation and improve focus. International bodies like EFSA have also evaluated L-theanine. Evidence on its effects is ongoing, and it is not considered a cure or cause of any specific disease.

Allergen info

L-theanine is not derived from any of the 9 major allergens recognized by the FDA. It does not contain gluten.

Products containing L- Theanine

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Fuze Beverage LLC Nos, Zero High Performance Energy Drink, Charged Citrus Soda 0kcal 0Protein 0Fat 0.2Carbs PHOCUS Sparkling Water Infused With Caffeine + L-Theanine Water 0kcal 0Protein 0Fat 0Carbs PHOCUS Grapefruit Sparkling Water Water 0kcal 0Protein 0Fat 0Carbs PHOCUS Sparkling Water Water 0kcal 0Protein 0Fat 0Carbs PHOCUS Cucumber Sparkling Water, Cucumber Water 0kcal 0Protein 0Fat 0Carbs PHOCUS Naturally Energizing Sparkling Water Infused With Caffeine + L-Theanine Water 0kcal 0Protein 0Fat 0Carbs

Pepsi-Cola North America Inc. Charged Cherry Burst Game Fuel Sparkling Juice Beverage From Concentrate, Cherry Burst Soda High in added sugars — 20% DV per serving 19kcal 0Protein 0Fat 5Carbs Pepsi-Cola North America Inc. Charged Berry Blast Sparkling Juice Beverage From Concentrate, Charged Berry Blast Soda High in added sugars — 20% DV per serving 19kcal 0Protein 0Fat 5Carbs

Pepsi-Cola North America Inc. Charged Tropical Strike Game Fuel Flavored Sparkling Juice Beverage From Concentrate, Charged Tropical Strike Soda High in added sugars — 20% DV per serving 19kcal 0Protein 0Fat 5Carbs

Pepsi-Cola North America Inc. Charged Original Dew Game Fuel Flavored Sparkling Juice Beverage From Concentrate, Charged Original Dew Soda High in added sugars — 20% DV per serving 19kcal 0Protein 0Fat 5Carbs

Wal-Mart Stores, Inc. Strawberry Drink Enhancer, Strawberry Liquid Water Enhancer 0kcal 0Protein 0Fat 25Carbs Wal-Mart Stores, Inc. Mixed Berry With Chamomile Flavor Relaxation Drink Mix, Mixed Berry With Chamomile Powdered Drinks 333kcal 0Protein 0Fat 33.3Carbs

Last updated: September 28, 2026

Note: This site presents label data from USDA FoodData Central for general information. It is not medical advice. Check the package label; formulations change.