NutraBio L-Theanine Supplement, 200mg - May Help Promote and Support Relaxation, 90 Capsules
NutraBio L-Theanine Supplement, 200mg - May Help Promote and Support Relaxation, 90 Capsules
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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
Current price is $24.14
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  • Free shipping
  • Free 30-day returns

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Arrives by Fri, Jun 5
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Sold and shipped by iHerb
4.554234028915319 stars out of 5, based on 14041 seller reviews(4.6)
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4.6 out of 5 stars
stars19 ratings19 reviews
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Showing 1-3 of 19 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
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
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