Nutricost L-Theanine Capsules

$21.95 Our Price
120 Caps (200 mg) Size
Nutricost L-Theanine Capsules

Nutricost L-Theanine is the #1 Rated L-Theanine Supplement, as it is high quality and half the price of its competitors. Nutricost L-Theanine is a double-strength formula that offers 200mg of L-Theanine in each capsule. Click Here for Lowest Price

Uniquely, Nutricost is one of the few companies that control the full chain of manufacturing, from sourcing to manufacturing in an FDA-registered facility to warehousing and fulfillment, ensuring strict quality standards are met. Nutricost also offers exceptional customer support for all of its products.

Priced under $11, Nutricost L-Theanine comes with 240 capsules, which is just $.04 per capsule. With Nutricost, you can be assured that this product does NOT contain ANY extra ingredients, fillers, or preservatives.

Nutricost L-Theanine comes with a 120-day, no-questions-asked, money-back guarantee – the best guarantee on the market!

  • #1 L-Theanine supplement
  • Amazon’s Choice
  • Only $0.04 per serving
  • 200mg of L-Theanine in each capsule
  • Non-GMO, gluten-free, and made in the USA!
  • No artificial colors, flavors, or chemical preservatives
  • 120-day, no-questions-asked, money-back guarantee!


Jason Lutz

Great product at a great price. I take one tablet before bed with magnesium and collagen protein and it's the perfect mix for a great night's sleep. I also love that this product is produced in a GMP facility. It's reassuring to know that I'm taking a quality supplement.

Zachary Weil

I heard that this boosted focus and was initially disappointed as I honestly don't feel any different while I am taking it. I decided to track the amount of work I got done over a month and took it intermittently throughout. I was shocked when I realized the days I took it I ended up accomplishing significantly more work.

Joyful Heart

This amino acid was recommended by my physician as a safe mood booster as I was transitioning off of a prescribed anti-anxiety med - she was right - it gives a contented feeling of support. And another family member takes it as a sleep aid - it has nothing to do with making one drowsy - it just helps with a feeling of being settled. Yay!

Gabrielle Frankel

This is my new favorite l-theanine. Previously I liked Source Naturals. I think this may be more potent. I now take it for caffeine induced insomnia, as I have a very low caffeine tolerance. I've taken it before exams with great results. Recently, I fed one to my rescued Bichon poodle before having her groomed. It was a big success.


Was on a competing brand of l-theanine (see pictures) and felt nothing for months. I've used l-theanine before and i'm familiar with how it should feel. This Nutricost brand is the real deal! Felt my mind clear up and a sense of ease and clarity within 10 min of taking a single 200mg pill on an empty stomach. The previous brand did nothing for me even when I doubled up to 400mg on an empty stomach! Save yourself time and money and try this brand first!