Theanine
Scored by the Formulate Research Team · Last reviewed July 2026
Overview: Thorne Theanine
Tea-derived amino acid that promotes relaxation, focus, memory, and a healthy stress response* Theanine, mostly found in tea, boosts the production of alpha brain waves and supports neurotransmitters that help manage stress.*
Score Breakdown
Formulate scores every product across six weighted dimensions. Each dimension is graded independently — hover or tap to see what drove each component.
Ingredients per Serving
Certifications & Testing
Other Ingredients
Hypromellose (derived from cellulose) capsule, Leucine, Calcium Laurate, Microcrystalline Cellulose
Recommended Use
Take 1 capsule one to three times daily or as recommended by your health-care practitioner.
Warnings
ALLERGY WARNING This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients. PREGNANCY If pregnant, consult your health-care practitioner before using this product. INTERACTIONS There are no known adverse interactions or contraindications at publication date.
Frequently Asked Questions
What is Thorne Theanine's Formulate score?
Thorne Theanine scores 90 out of 100 (grade A) on Formulate's ingredient-level rubric, which weighs evidence quality, dose accuracy, bioavailability, transparency, safety, and manufacturing practices.
Is Thorne Theanine worth it?
Thorne Theanine scores 90/100 (grade A). That puts it in Formulate's top tier: its ingredient doses, forms, and label transparency hold up against the clinical evidence, and it carries credible third-party testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Thorne Theanine?
Each serving contains L-Theanine (600 mg). Serving size: 1 Capsule. 90 servings per container.
How do I take theanine?
Take 1 capsule one to three times daily or as recommended by your health-care practitioner.
Who makes Theanine?
Theanine is made by Thorne. See Formulate's full grade and product lineup for Thorne on its brand page.
Is Thorne Theanine third-party tested?
Thorne lists the following certifications and testing for this product: Gluten Free, Soy Free, Dairy Free, Natural Flavors, Natural Colors, Made in USA, Third-Party Contents Certified, Thorne Verified, GMP Certified.
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Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.