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L-Theanine Capsules

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In stock

Price From: FROM $13.96

Ships Monday, July 22 if ordered in the next 1 day, 20 hours and 33 minutes!

L-Theanine Capsules


  • Pure powder
  • Easy-to-swallow capsules
  • Non-GMO
  • Taste

  • Mixability

L-Theanine is an amino acid that is naturally found in green tea, which is a rich source of polyphenols that have antioxidant properties and promote overall health.


Serving Size & Timing

This supplement should be taken in servings of 1 capsule once per day.

Nutritional Information

Supplement Facts

Serving size: 1 Capsule
Serving per container: *
Amount Per Serving % Daily Value**
L-Theanine 500mg *
* Daily Value not established.
** Based on 2,000 calorie diet

Gelatin Capsule or Vegetarian Capsule

Sugar, soy, dairy, yeast, gluten, corn and additives.

As a dietary supplement, take 1 capsule daily.



This supplement is considered pharmaceutical grade and contains no fillers of any kind. It is totally vegan and is derived from the tea (Camellia sinesis) plant.


Note: This supplement may lower blood pressure. Those who are currently taking blood pressure medication or have a history of related issues should first discuss use with a trusted health care professional. Take with caution.

This product should not be taken by anyone that has ever been diagnosed with liver or kidney disease or by women who are nursing or pregnant. This supplement has no side effects at recommended servings but may function as a sedative if serving size is not adhered to.

This is a capsuled product.

California residents: Click here for Proposition 65 warning.

Customer Reviews

Very Effective
These capsules are high quality. Calming effects just minutes after digestion.*

On 2/6/2019 Hart said...

The value on this product is fanatastic
You're getting a lot of theanine for a very good price. It's possible that I've had better quality but the dosage per capsule makes up for this completely.*

On 1/14/2019 Christian said...

Great caffeine synergist
Great quality l theanine from Bulk Supplements! I use it everyday with caffeine. Great for curbing the jittery anxious feeling from caffeine. *

On 10/26/2018 Jacob said...

Great for Daily Stress, Stimulant Use
Been taking the capsules for a while now. I find I am more relaxed throughout the day, not a massive difference, but it's like every stressful event is taken down one step. So while on a daily basis, it doesn't have a profound effect, it's quite helpful long term.

Also L-theanine has been very effective for counteracting the jittery feeling I get from stimulants. I generally take it in the morning alongside vitamins/other supplements. Sleep quality has improved a bit too. *

On 8/27/2018 Price said...

Very convenient in pill form
I've been using Bulksupplements'powdered form of L-Theanine for the past two months which can get a little messy, so I decided to order the pills. Much easier to dose with and very convenient to simply pop a couple into your overnight bag if you're traveling and don't want to take your scales etc.

Highly recommended.*

On 12/3/2017 Paul said...

Helps my Insomnia
I find this product will calm racing mind by day, and a great sleep aid taken before bed. Very pleased with it's effects!*

On 6/7/2017 Angela said...

Alcar Review
I have taken this before to help my alertness. I am 72 years old but most people think I,m 50. This product is great for helping me recall things that I wouldn't normally, without this product..Great stuff.*

On 3/31/2017 Acetyl L Carnitine powder said...

The 250mg versus the usual 200mg is nice. It's really convenient encapsulated, but also easy to empty into say BP coffee for example. Actually has a sweet umame taste too.*

On 3/24/2017 David R. said...

The best L-theanine I had
I have only been taking L-theanine from Bulk Supplements for a couple week now but it work great. I have tried other brand that use cheap fillers than make their product ineffective but not this stuff. I drink more energy drinks than I know I should at work and sometimes all the caffeine gets me agitated but capsule of this stuff clams. I will be ordering more of this stuff. *

On 1/11/2017 Jeremy said...

Great stuff
Works great for reducing adrenaline. Feels like I just meditated for an hour.*

On 11/13/2016 Kevin said...

I am not overly hyper but I do have a high stress career and feel like my mind goes in a million different directions at times. This supplement has taken that anxious feeling down several notches. I just started taking it so I hope to feel more benefits in time.*

On 7/3/2016 Patricia said...

Best price by far
L Theanine is great for anxiety, focus and sleep. It's a really excellent supplement and after looking high and low for a less expensive option I found this one. By far the best bang for your buck and well worth it. *

On 5/10/2016 Alison said...

Loving Theanine
This is love at first dose. I probably took a bit much with this one but I will continue to take higher doses. I take 1000mg in the morning and sometimes the same during the evening. I feel more calm and centered. My breathing is also great as i breath from the pit of the stomach. This theanine is very zen-like. *

On 3/23/2016 max said...

Good price for good product
Theanine is great for stress reduction and general relaxation. Its an excellent combination with caffeine in a 2:1 theanine:caffeine ratio. The only thing I would like to see is perhaps offering this product in a smaller dosage size. Each capsule is 500mg, so perhaps 200-300mg capsules would be nice.*

On 9/28/2015 Frank said...

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