Promotes relaxation and focus: Supports alpha brain wave activity for calm yet alert mental states
Non-sedating formula: Enhances mental acuity and emotional balance without causing daytime drowsiness
Reduces acute stress: Helps manage stress and supports the transition to restful sleep
NSF and Informed Sport certified: Ensures high quality, safety, and third-party verified standards
Easy oral administration: Convenient capsule form for daily use
Summarized by Shop
L-Theanine is a naturally occurring amino acid found in tea leaves that promotes calm, focused mental states without causing drowsiness. It works by increasing alpha brain wave activity and supporting neurotransmitters like GABA and serotonin—helping you stay relaxed yet alert.
Often used to reduce acute stress, improve focus, and support
Form
Capsules
Serving Size
1 capsule (containing 200 mg L-Theanine)
Capsules per Bottle
60
Certifications
NSF certified, Informed Sport certified
Dietary Preferences
Vegan, Vegetarian, Non-GMO, Gluten-free, No artificial colors, No artificial flavors, No artificial sweeteners, No preservatives
Flavor
Unflavored
Summarized by Shop
4.8
154 ratings
5
4
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1
Thankful for finding this product!
I had tried L-Theanine previously in another product and it made me feel a bit off balance. I was hesitant to try it again. However the science convinced me to give it another try. I’m happy to say that Momentous’ product has provided a much better result for me. I’m learning that while it is suggested that you take it 30-60 min before bed for best sleep, for me, through a bit of trial and error, I have found it works best when I take it in late afternoon. My sleep has in fact improved and I wake feeling more rested, which was the goal:)
F
Fernanda · Yesterday
A favorite part of my nighttime routine
I take this about 45–60 minutes before bed and really like how it helps me wind down without making me feel groggy or overly sleepy. It’s become such an easy part of my nighttime routine. Simple, effective, no side effects for me, and another Momentous supplement I trust for quality and testing.
S
Svetlana · August 24, 2026
In the evening it helps me wind down, but it doesn’t knock me out. Effect is mild and lasts a few hours. No real side effects for me.