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Life Extension

L-Theanine, 60 Vegetarian Capsules (100 mg per Capsule)

4.8 · 2639 reviews
1,912 ₽

Gluten Free Non GMO LE Certified Promotes a Calming and Mood Enhancing Effect Dietary Supplement What Is L-Theanine? L-Theanine is an amino acid found in tea that produces calming effects by favorably modulating several aspects of brain activity. L-Theanine induces brainwave patterns similar to those associated with meditation and massage. The calming effects of the L-Theanine produce brainwave patterns similar to meditation & massage.

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Gluten Free Non GMO LE Certified Promotes a Calming and Mood Enhancing Effect Dietary Supplement What Is L-Theanine? L-Theanine is an amino acid found in tea that produces calming effects by favorably modulating several aspects of brain activity. L-Theanine induces brainwave patterns similar to those associated with meditation and massage. The calming effects of the L-Theanine produce brainwave patterns similar to meditation & massage.

Customer reviews

5.0
verified purchase
A good Product

This is my second purchase for a friend who says this is a good quality product. He took the 100mg one but i dun know it is out of stock or discontinued or what, so he asked me to buy this and taking one twice a day. It helps to calm him and help him relax and he is able to sleep at night.

9/3/2024
5.0
verified purchase
Great sleep

There are few things better than a personal recommendation, so I gave it a try. I take one capsule at bedtime, and my sleeping has improved dramatically. L-Theanine has become part of my night time ritual. I tried several other brands of L-Theanine. Came back to this brand. Cheaper does not equal a quality product that works

5/28/2022
3.0
verified purchase
Price for Size

You get a good amount in here for the price. Packaging is always solid, however not my go to for l theanine brands unless I’m on a tight budget. Even so, I’d rather get the pure powder form if cost per milligram was a concern for purchase. It’s just not as effective compared to other ones Ive tried, and trust me, I’ve tried A LOT!

9/16/2025
5.0
verified purchase

I ordered this late one evening after spending far too long comparing alternatives. By the time it arrived, I’d almost forgotten why I chose it. A few weeks of regular use have made the decision seem surprisingly sensible, though. It’s straightforward, dependable, and doesn’t require me to rearrange my day around it.

9/4/2026
5.0
verified purchase
Works really well

Calming effect notice within half hour. Easy size to swallow and can feel the benefit.

5/27/2026
5.0
verified purchase
Excelent!

When you need a bit of relaxation and good sleep. I take this.

3/12/2026
5.0
verified purchase
Very good product, I will continue using it!

Very good L-theanine. I can feel the the quality is very good, after taking one it boosts my energy levels for that day, so I think size of one is very good dosage. I believe the ingredients are good. I might test other brands, but this one seems to be very good.

2/15/2026
5.0
verified purchase
Excellent quality

Though this is a bit more expensive, I like that this l-theanine uses a well-researched form - Alphawave. The company is also solid, third-party tested.

2/10/2026
5.0
verified purchase

Bought it to improve my health, just started to take, but I believe it will help

12/12/2025
5.0
verified purchase
Life Extension, L-Theanine.

A dietary supplement containing an amino acid that has a beneficial effect on certain aspects of brain activity. It has a relaxing effect. The capsules are a very convenient size and have a pleasant taste.

11/18/2025