L-Theanine 200mg Capsules 100ct
Family owned & trusted since 1972
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Windmill · Family owned since 1972
- AuthorizedWindmill Retailer
- Same-DayShipping
- 30-DayGuarantee
- Authorized Windmill Retailer
- Manufacturer-Sealed
- Ships Same Business Day
- 30-Day Guarantee
“Great product, great site, quick delivery and great prices!!!”
- 100% Authentic Products
- Temperature-Controlled Storage
- 30-Day Guarantee
Product details
About This Product
Find your calm without the fog — Windmill L-Theanine 200 mg delivers a clinically studied amino acid naturally found in green tea to support cognitive function and promote relaxation, all in one easy daily capsule.
Key Benefits
- 200 mg L-Theanine per capsule — a research-backed dose for cognitive support and relaxation
- Promotes a calm, focused state of mind without drowsiness
- Ideal for students, professionals, and anyone managing everyday stress
- 100-capsule supply — take 1 capsule daily or as directed by a healthcare professional
- Made in the U.S.A. from globally sourced ingredients
- Free from sugar, wheat, soy, milk, artificial colors, artificial flavors, and preservatives
- Non-GMO and Gluten-Free formula
Windmill Health Products has been a family-owned American supplement brand since 1972 — delivering trusted, quality nutrition you can count on every day.
What's Inside
The full Supplement Facts panel for this product is on the bottle label.
At a Glance
- DietaryMade in the USA
Dietary Details
- Made in the USA
- Non-GMO
- Gluten-Free
- Soy-Free
Review the complete bottle label for all ingredients, daily values, allergens, and warnings.
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Direct from the source
Authorized Reseller
We buy directly from the manufacturer, so every product is 100% authentic and properly sourced.
Sealed & Brand-new
Factory-sealed.Manufacturer-sealed, never opened. Stored in our climate-controlled facility.
Same-day Shipping
Order by 5 PM ET.Order before 5 PM ET and we'll ship it the same business day.
30-day Guarantee
Satisfaction guaranteed.Every order is backed by our 30-day satisfaction guarantee.
Secure Checkout
Apple & Google Pay.Stripe-powered with Apple Pay and Google Pay supported.
Tried this product?
Leave the first review and we’ll send you 25% off your next order — for any honest review, good or bad.
Frequently Asked Questions
Most people notice a difference within 2–4 weeks of daily use.
Supplements work gradually, so consistency matters most. Take it at the same time each day and check in on how you feel week to week.
Follow the directions on the label.
Take it at the same time each day. With a meal is a good default — some nutrients absorb better with food.
It’s made under the FDA’s current Good Manufacturing Practice (cGMP) rules, which require every batch to be tested for identity, strength and purity.
Certifications: Made in the USA, Non-GMO, Gluten-Free, Soy-Free, Dairy-Free, No Artificial Colors, No Artificial Flavors, No Preservatives, Sugar-Free.
We buy directly from authorized Windmill distributors — never marketplace resellers.
Generally, yes. If you take sleep or anti-anxiety medication, check with your doctor first.
Space calcium, iron, zinc and magnesium about two hours apart, and check your other supplements for the same ingredients so doses don’t stack up.
Taking medication, pregnant or nursing? Ask your healthcare provider first.
Return any unopened bottle within 30 days of delivery for a full refund. No restocking fee.
Arrived damaged or wrong? Send us a photo at moorevitamins.com/contact and we’ll refund or replace it.
Yes. Subscribe & Save takes 10% off every delivery, not just the first.
Choose monthly, every 2 months or every 3 months. Skip, pause or cancel anytime from your account — no fees, no minimum.
Complete Your Routine
