L-Theanine Capsules
Scored by the Formulate Research Team · Last reviewed July 2026
Score Breakdown
Three factors carry this score; three more are checked separately and can only take points away. Hover or tap to see what drove each one.
Ingredients per Serving
Certifications & Testing
Other Ingredients
Rice Flour, Gelatin Capsule
Recommended Use
Recommended Use: As a dietary supplement, take 1 capsule 1-2 times daily with 8-12 oz of water, or as directed by your physician.
Warnings
Warning: Consult your physician prior to use if you are pregnant or nursing. Do not exceed recommended use. Keep out of reach of children. Do not use if safety seal is broken.
Frequently Asked Questions
What is Nutricost L-Theanine Capsules's Formulate score?
Nutricost L-Theanine Capsules scores 95 out of 100 (grade A) on Formulate's ingredient-level rubric: clinical evidence, dose accuracy and bioavailability carry the score, while manufacturing, transparency and safety are checked separately and can only deduct.
Is Nutricost L-Theanine Capsules worth it?
Nutricost L-Theanine Capsules scores 95/100 (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 Nutricost L-Theanine Capsules?
Each serving contains L-Theanine (200 mg). Serving size: 1 Capsule(s). 240 servings per container.
How do I take l-theanine capsules?
Recommended Use: As a dietary supplement, take 1 capsule 1-2 times daily with 8-12 oz of water, or as directed by your physician.
Who makes L-Theanine Capsules?
L-Theanine Capsules is made by Nutricost. See Formulate's full grade and product lineup for Nutricost on its brand page.
Is Nutricost L-Theanine Capsules third-party tested?
Nutricost lists the following certifications and testing for this product: cGMP Certified, FDA Registered, Non-GMO, Gluten-Free.
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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.