Momentous L-Theanine Supplement

Momentous L-Theanine Supplement

$ 39.95

Pay with HSA / FSA

Flex HSA/FSA explanation

IN STOCK Ships in 1-2 business days

Product Details

Momentous L‑Theanine offers a scientifically supported way to promote calm, focus, and better sleep without next-day drowsiness. Made from an amino acid found naturally in green tea leaves, this supplement boosts the production of calming neurotransmitters like GABA and serotonin, while encouraging the brain’s alpha-wave activity for relaxed alertness.

This NSF Certified for Sport formula is non-GMO, gluten-free, and verified for purity. Whether taken before bed to support sleep or during the day to ease stress without drowsiness, Momentous L‑Theanine promotes both cognitive function and emotional balance.

Product Specs

  • Count: 60 capsules
  • Serving size: 1 capsule
  • Amount per serving: 200 mg L-theanine
  • Other ingredients: microcrystalline cellulose and vegetable capsule (cellulose and water)

Key Benefits

  • Supports relaxation by triggering the production of calming neurotransmitters like GABA and serotonin to calm the mind and body
  • Promotes calm without daytime drowsiness by upping GABA, serotonin, and dopamine
  • Encourages healthy sleep patterns by increasing alpha brain wave activity
Safety & Storage

Talk to your doctor before use if you are pregnant, nursing, have a medical condition, or are taking other medications or supplements. Do not exceed the recommended dose unless directed by a qualified medical professional. Discontinue use and seek medical attention if you experience allergic reactions or severe side effects.

Store in a cool, dry place away from direct sunlight, heat, and moisture. Keep the bottle tightly closed when not in use to preserve freshness and potency. Keep out of reach of children to prevent accidental ingestion. Do not use if the safety seal under the cap is broken or missing.

Shipping & Returns

This product is not eligible for returns. Customers have a 60-minute window after placing an order to make changes or cancellations. After this time, in-stock items begin fulfillment and may no longer be altered. Customers experiencing issues with their purchase should contact Momentous for assistance.

Free Shipping for orders $50 and above in contiguous U.S. For orders under $50.00, the shipping rate is $7.99. Orders shipping to Alaska, Hawaii, Puerto Rico, Guam, and Virgin Islands are subject to an additional shipping fee.

Expedited Shipping

  • 2 Business day shipping - $25
  • Overnight shipping - $85

Order must be placed and with approved prescription (if applicable) before 10 am EST to ship same-day. Excludes Sat/Sun delivery.

Expedited shipping is not available:

To Alaska, Hawaii, PO boxes and some rural areas.

During excluded holidays

Please note that your order may ship in multiple packages.

Once your order ships, you will receive a tracking number and estimated date of delivery. Most customers receive their orders within 4-7 days of shipping. Carrier delays are outside of our control.

Find our full Shipping & Returns policy here.

Who It’s Best For

  • Those who struggle to relax before bedtime and hesitate to take a nighttime supplement because of typical daytime drowsiness effects
  • Anyone wanting a non-sedating supplement to improve sleep
  • Individuals looking for a sleep supplement that triggers mood-regulating neurotransmitters

How It Works

L-theanine crosses the blood-brain barrier and triggers neurotransmitters like GABA, serotonin, and dopamine to promote mood and relaxation. This combination also reduces neural excitability, another bedtime benefit, and it increases alpha brain wave activity that calms the mind without causing daytime drowsiness. 

How to Use It

  • Take one 200-mg capsule 30 to 60 minutes before bedtime with or without food.

Frequently asked questions

Where is L-Theanine sourced from?

Momentous L-Theanine is derived from high-quality green tea leaves grown in Asia, a region known for its rich tradition of tea cultivation. Sourcing from this area ensures a pure, potent form of L-theanine that supports its calming and focus-enhancing benefits.

Is L-Theanine safe to use?

Yes, L-theanine is widely regarded as safe and well-tolerated for most people. Derived naturally from green tea leaves, it’s included in Momentous L-Theanine for its ability to support relaxation, focus, and cognitive performance without sedative effects or dependency risk.

Will L-Theanine make me feel drowsy?

No, L-theanine helps promote a calm, focused state without causing drowsiness. It’s ideal for reducing stress while maintaining mental clarity, which makes it suitable for use during the day or in the evening as part of a wind-down routine.

Can I take L-Theanine with other supplements or medications?

L-theanine is generally safe to combine with other supplements or medications, including other Momentous products. However, because individual responses vary, it’s always best to consult your healthcare provider before adding it to your regimen, especially if you’re on prescription medications.

Does L-Theanine help with sleep?

Yes, L-theanine can support better sleep quality by promoting a relaxed mental state and reducing racing thoughts at bedtime. While it doesn’t directly induce sleep, it helps create the right conditions for falling asleep more easily and sleeping more soundly.

Who should not use Momentous L-Theanine?

Do not use if you:

  • Have a known sensitivity or allergy to L-theanine or capsule ingredients like vegetable cellulose
  • Are taking medications or supplements that alter neurotransmitter activity 
  • Favor and can fulfill dietary needs through food alone

Reviews