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NutraBio L-Theanine Supplement, 200mg - May Help Promote and Support Relaxation, 90 Capsules
Key item features
- What is L-Theanine? L-Theanine is a natural phytochemical found in Japanese green tea. L-Theanine is a non-essential amino acid that is present in the brain and is a close relative of Glutamate
- Benefits: L-Theanine may help promote a restful, relaxed state while maintaining daytime alertness
- Suggested Use: Take 1 capsule 1-3 times daily, in divided doses, between meals
- NutraBio Quality: L-Theanine is vegetarian, non-GMO, gluten-free, lactose-free, third-party tested, and manufactured in the USA in a facility that meets FDA 21 CFR Part 111 c-GMP regulations
- Third Party Tested, Full Disclosure: Like all NutraBio products, our L-Theanine supplement is tested by an independent third-party lab to ensure it is both pure and meets strict quality standards. All NutraBio products feature fully transparent labels with no proprietary blends
Specs
- Vitamin & supplement typeL-Theanine
- Health concernImmune System Support
- BrandNutraBio
- Product usage frequencyDaily
- Ingredient preferenceGluten-Free
- Age groupAdult
Current price is USD$24.60
Price when purchased online
- Free shipping
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Arrives by Fri, Jun 26
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Sold and shipped by iHerb
4.556992836775854 stars out of 5, based on 14379 seller reviews(4.6)14379 seller reviews
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Other sellers
$22.99
+Free shippingShipping, arrives by Fri, Jun 26 to Columbus, 43215
Sold and shipped by NutraBioPro Seller
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About this item
Product details
L-Theanine is a natural phytochemical found in Japanese green tea. L-Theanine is a non-essential amino acid that is present in the brain and is a close relative of Glutamate. Studies indicate that L-Theanine interacts with the neurotransmitter, GABA (Gamma-Aminobutyric Acid). L-Theanine may help promote a restful, relaxed state while maintaining daytime alertness.
- What is L-Theanine? L-Theanine is a natural phytochemical found in Japanese green tea. L-Theanine is a non-essential amino acid that is present in the brain and is a close relative of Glutamate
- Benefits: L-Theanine may help promote a restful, relaxed state while maintaining daytime alertness
- Suggested Use: Take 1 capsule 1-3 times daily, in divided doses, between meals
- NutraBio Quality: L-Theanine is vegetarian, non-GMO, gluten-free, lactose-free, third-party tested, and manufactured in the USA in a facility that meets FDA 21 CFR Part 111 c-GMP regulations
- Third Party Tested, Full Disclosure: Like all NutraBio products, our L-Theanine supplement is tested by an independent third-party lab to ensure it is both pure and meets strict quality standards. All NutraBio products feature fully transparent labels with no proprietary blends
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.
Specifications
Brand
NutraBio
Count per pack
1
Health concern
Immune System Support
Label image
Ingredient List
Indications
Health Concern
Immune System Support
Directions
Instructions
As a dietary supplement, take 1 capsule daily, preferably with a meal, or as directed by your physician.
Warranty
Warranty information
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Customer ratings & reviews
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Showing 1-3 of 20 reviews
Oct 7, 2025
Castagna
5 out of 5 stars review
L-Theanine
L-Theanine helps me to relax when I go to bed on a hard workout. It eases and relaxes my body. Great stuff.
Incentivized Review
Review from NutraBio
Helpful?2RJRS8KTL5HC659990118
Apr 22, 2026
Robin M.
5 out of 5 stars review
Seller Verified Purchase
L-theanine is a regular part of my sleep rountine. Love it.
Review from https://nutrabio.com
Helpful?2RJRS8KTL5HC659990118
Mar 25, 2026
robert h.
5 out of 5 stars review
Seller Verified Purchase
Great product great pricing and fast shipping
Review from https://nutrabio.com
Helpful?2RJRS8KTL5HC659990118
