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L-Theanine-Bottle
L-Theanine supplement facts
L-Theanine-Bottle
L-Theanine supplement facts
4.8
Rated 4.8 out of 5 stars
215

L-Theanine

60 Servings Per Container: $0.49/Serving

Supports relaxation, mental clarity, and stress response—helping you stay calm and focused without drowsiness

  • Promotes calm, focused mental clarity
  • Helps reduce acute stress without brain fog
  • Supports relaxation and sleep quality
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"Within a week of using L-Theanine I was falling asleep faster than I have for years. I'm a fan!"

Ami (Verified Customer)

"L-Theanine has been a game changer for my sleep. There’s absolutely zero drowsiness when I wake in the morning."

Sharon (Verfied Customer)

"I take one at bedtime, within minutes, zonked out. This assures a quick and effective zonk."

Lance (Verfied Customer)

Calm, Focused Mental Performance.

L-Theanine is a naturally occurring amino acid that promotes relaxation without sedation—helping you stay clear, composed, and focused under stress or wind down for sleep.

Calm, Clarity, and Control.

L-Theanine helps reduce acute stress while supporting a calm, focused mental state—so you can stay composed without losing your edge. By promoting relaxation without drowsiness, it allows you to think clearly, manage pressure more effectively, and maintain steady focus throughout the day. Whether you're navigating a demanding schedule or winding down at night, L-Theanine supports a more balanced, controlled state of mind.

L-Theanine works by supporting the brain’s natural relaxation pathways without impairing alertness.

It increases alpha brain wave activity—associated with a calm, focused mental state—and helps regulate key neurotransmitters like GABA and serotonin, which influence mood, stress response, and mental clarity.

By reducing neuronal excitability, L-Theanine promotes a state of relaxed alertness, making it effective for both daytime focus and nighttime wind-down.

Flexible, Daily Support

Take 1 capsule (200mg) daily.

  • For focus and stress: take anytime during the day
  • For sleep: take 30–60 minutes before bed


Consistent daily use is recommended for best results.

L-Theanine 200mg per serving

Other Ingredients: Rice Flour, Hypromellose (Capsule), Magnesium Stearate, Silica

GMO Free, Gluten Free, Vegan.

When to Use
Daily, or as needed for stress, focus, or sleep support.

Onset Time
Some effects may be felt within hours, with more noticeable benefits after consistent use over several days.

Expected Results

  • Increased relaxation without drowsiness
  • Improved focus and mental clarity
  • Easier transition to sleep and better sleep quality

Frequently Asked Questions

L-Theanine is an amino acid naturally found in green tea. As a dietary supplement, it is commonly used to support relaxation, stress management, and calm focus without causing significant drowsiness.

L-Theanine is used to support relaxation, stress management, and mental clarity. Many people take it to promote a balanced mental state without sedation.

Yes. L-Theanine is commonly taken daily when used as directed. Many individuals incorporate it into their routine to support ongoing stress management and focus.

L-Theanine is known for promoting relaxation without significant drowsiness at recommended serving sizes. Many people use it to support a calm, focused state while remaining mentally alert.

Individual responses may vary depending on dosage and timing.

Yes. L-Theanine is often combined with caffeine to support focused energy. While caffeine promotes alertness, L-Theanine may help promote a smoother, more balanced experience.

Yes, L-Theanine is often used to support sleep quality by promoting relaxation and reducing mental tension. It does not act as a sedative, but may help create a calmer state that supports easier sleep onset and more restful sleep.

L-Theanine is commonly taken alongside other supplements, including caffeine, magnesium, and ingredients that support focus or sleep. Many people include it as part of a broader daily routine.

If you are taking medications or have specific health concerns, it is recommended to consult with a healthcare professional before use.

Yes. Momentous L-Theanine is NSF Certified for Sport®, meaning every batch is independently tested for purity, potency, and label accuracy. NSF Certified for Sport® also confirms the product is tested for banned substances, making it suitable for drug-tested athletes.

4.8
Rated 4.8 out of 5 stars
Based on 215 reviews
Total 5 star reviews: 191 Total 4 star reviews: 13 Total 3 star reviews: 4 Total 2 star reviews: 2 Total 1 star reviews: 5
95%would recommend this product
Reviews Summary
Customers say this supplement significantly improves their sleep quality and helps them fall asleep faster. Many reviews mention waking up feeling refreshed without morning grogginess, unlike other sleep aids. Users frequently combine it with magnesium or other supplements for enhanced effects. Common feedback includes its calming properties and ability to quiet racing thoughts before bedtime. While most praise its effectiveness for staying asleep through the night, one reviewer noted it didn't work for them. Many appreciate the quality and third-party testing, with several mentioning improved sleep metrics on tracking devices.
Customers Talked About
215 reviews
  • A
    Ami
    Verified Buyer
    2 days ago
    Rated 5 out of 5 stars
    Help, i can't fall asleep at night! Oh wait, now i can with L-Theanine

    I've been struggling with sleep for a couple of years through peri-menopause and now menopause. It could take me hours most nights to fall asleep at night. I have tried everything from limiting screen time and caffeine, taking a magnesium supplement, over the counter and prescription strength sleep aids and my favorite from a health coach was eat turkey before bed for the sleepy properties of tryptophan. None of these inherently helped me fall asleep. Within a week of using L-Theanine I was falling asleep faster than I have for a couple of years. I'm a fan!

  • J
    Julie
    Verified Buyer
    2 days ago
    Rated 5 out of 5 stars
    Better sleep

    Sleep has started to improve.

  • L
    Lance
    Verified Buyer
    1 week ago
    Rated 5 out of 5 stars
    Zonkarrific

    This stuff works, simple as that. I take one at bedtime, within minutes, zonked out for hours. Don't know how or why, or whether having a mug of tea would do the same. I have no trouble getting to sleep in general, but this assures a quick and effective zonk.

  • J
    Jamie
    Verified Buyer
    1 week ago
    Rated 5 out of 5 stars
    I feel so much...

    I feel so much better since starting this amazing product

  • L
    Lissa
    Verified Buyer
    3 weeks ago
    Rated 5 out of 5 stars
    Amazing

    Love that it helps keep me balanced with protein coffee