Your Cart is Empty
But it doesn't have to be.
Continue Shopping.
Added to Cart
Cart Total:
Customers Also Bought:

Doctor's Best, Suntheanine L-Theanine, 150 mg, 90 Veggie Caps

Doctor's Best, Suntheanine L-Theanine, 150 mg, 90 Veggie Caps

Shipping Saver ?
Our Price:
You Save:
$14.17 (47)
  • Quantity Discount
  • Buy 4+
    Save 5%
  • Buy 12+
    Save 10%

Sorry, this product is no longer in stock.

Earn 5% Loyalty Credit ?
In Stock
  • Expiration Date: Jul 2019
  • Shipping Weight:
    0.13 lbs
    Switch to Metric units
  • Product Code: DRB-00197
  • UPC Code: 753950001978
  • Package Quantity: 90 Veggie Caps
  • Dimensions:
    4 x 2.1 x 2.1 in, 0.1 lbs
    Switch to Metric units
Bundle Offer
Save $2.00 when you purchase these items today for only $18.77
Total: $20.77
Combo Discount: - $2.00
Together: $18.77

Sorry, this product is no longer in stock.

Product Overview


  • Science-Based Nutrition
  • Dietary Supplement
  • Helps Promote Relaxation without Drowsiness
  • Helps Reduce Stress and Tension
  • Vegan

Suntheanine is the premier, patented form of the amino acid L-theanine. Suntheanine is the purest form of L-theanine on the market today. L-theanine is an amino acid derived from green tea that is responsible for the relaxation-inducing effect of tea consumption.

  • Helps promote a relaxed state without drowsiness.
  • Helps ease stress and everyday nervous tension.
  • Helps promotes a healthy mood and alertness.

Suggested Use

Suggested Adult Use: Take 1 capsule daily away from food, or as recommended by a nutritionally-informed physician.

Other Ingredients

Microcrystalline cellulose, modified cellulose (vegetarian capsule)

Non-GMO, gluten-free, vegan


Store in a cool dry place.

Supplement Facts
Serving Size: 1 capsule
Serving Per Container: 90 servings
  Amount Per Serving %Daily Value
Suntheanine L-theanine 150 mg
†Daily Value not established.
iHerb Customer Reviews

My go to sleep / stress supplement

Posted by 5338974855904504378 on Jun 18, 2017 | Verified Purchase

I use this daily before bed. Good for stress and relaxation

Thanks for your feedback!


Posted by iHerb Customer on Jun 14, 2017 | Verified Purchase

Good product at a fair price. For the quantity I think per capsule it was a great price. Love this brand of products.

Thanks for your feedback!

The best product for my attention deficit and spectrum child

Posted by Reviewer2692996 on Jun 04, 2017 | Verified Purchase

We are now on 300mg in the morning. It did good to my boy. It is gentle enough not to put him down, it somehow makes him more patient. He had 0 patiency at 3yrs old - he couldn't learn things out of impatience. I think this helped and still helps. I continuously order this product.

Thanks for your feedback!

This product has medium benefits

Posted by MrJaniHynninen on May 31, 2017 | Verified Purchase

I am personally not getting this product that what I expected...relaxation and self-assurance even I took 600mg at once

Thanks for your feedback!

Good product

Posted by 5258938990857851181 on May 30, 2017 | Verified Purchase

I try this and I will buy again!

Thanks for your feedback!