L-Theanine Powder

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L-Theanine is an amino acid commonly found in Green Tea leaves and derived from the leaves. This amino acid has shown to help with alertness, promoting calming & soothing effects, and blocking the excess binding of Glutamic Acid to Glutamate receptors in the brain. L-Theanine has been shown to have similar effects to caffeine without the negative effects of jitteryness, aniexty, or drowsiness. It is commonly used with Caffeine due to synergetic effects all while promoting alertness, focus, and calmness.

Directions & Allergens

Suggested Use: 

As a dietary supplement, take 1 leveled scoop (~200mg) with 6 - 8 ounces of water or suitable beverage. Taken 1 - 2 times daily, preferably on an empty stomach or as directed by a qualified health professional. A micro scale is recommended for accurate measuring.


This product contains no Soy, Dairy, Dairy byproducts, Eggs, Fish, Shellfish, Wheat, Gluten, Tree Nuts, or Sesame Seeds.


This is a NON-GMO ingredient manufactured using organic starting ingredients.


Store in a cool, dry place. Re-seal zipper immediately after use to preserve freshness.

Labels & Instant COA

125 Gram:


Statements & Warnings

† These statements have not been evaluated by the Food & Drug Administration. This product is not intended to diagnose, treat, cure or prevent any diseases.

Keep out of the reach of children. Do not take this or any other supplement if under the age of 18, pregnant or nursing a baby, or if you have any known or suspected medical conditions and/or taking prescription drug(s) or OTC medication(s). Always consult with a qualified health physician before taking any new dietary supplement.

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5 Reviews

  • 5

    Posted by David Dale Straub on 30th Aug 2019

    super great product

  • 5
    theanine is a great focus and calming agent.

    Posted by Timothy Lawler on 27th Aug 2017

    I have been using hardrhino products for years. Guardian wholesale is the best quality products on the market. I always look at hardrhino before going to any other sources to see if they have any particular product I am looking for. I have been using amino acid therapy four different things. Theanine is a great calming and focus amino acid. Hardrhino is the best quality of its kind.

  • 5
    Very good anti anxiety supplement.

    Posted by james on 15th Jun 2015

    This l-theanine is a great product I take it at around 1,000mg but I drink a lot of coffee and it seems to help take away the anxiety of coffee and just makes it better . My brother also takes it for anxiety and he only takes about 150 mg and it helps him all day. It helps calm the mind but does not cause drowsiness. I have taken hard drugs in the past and this is not one of them it's perfectly legal , it will calm your mind if you take enough of it . If I'm really filled with anxiety I also take
    magnesium glycinate at around 500mg and that will calm me down . If my brother took this amount it would put him in a deep sleep. If your new to this give it a try it's all natural but can be strong if you take large amounts .

  • 5
    Great Price

    Posted by Brian on 24th Feb 2015

    HR has one of the best prices on this supp that I have found. Coupled with the very reasonable shipping fee, I'll be back as a customer in the future.

    Powder is legit and works well.

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