L-Theanine
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
Cellulose, Hypromellose, Magnesium Stearate
Recommended Use
Recommendation: Adults take 2 capsules one to two times daily.
Warnings
If you are pregnant, nursing, or taking any medications, consult a healthcare professional before use. Keep out of reach of children. Safety sealed with inner seal. Do not use if seal is broken or missing.
Frequently Asked Questions
What is Nature's Way L-Theanine's Formulate score?
Nature's Way L-Theanine scores 88 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 Nature's Way L-Theanine worth it?
Nature's Way L-Theanine scores 88/100 (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 Nature's Way L-Theanine?
Each serving contains L-Theanine (200 mg). Serving size: 2 Capsule(s). 30 servings per container.
How do I take l-theanine?
Recommendation: Adults take 2 capsules one to two times daily.
Who makes L-Theanine?
L-Theanine is made by Nature's Way. See Formulate's full grade and product lineup for Nature's Way on its brand page.
Is Nature's Way L-Theanine third-party tested?
Nature's Way lists the following certifications and testing for this product: Dairy-Free, Gluten-Free, Vegan, Vegetarian.
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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.