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
4.9
163 ratings
5
4
3
2
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 · September 19, 2026
Sleep so good!
Pricey, but so worth it. This worked for me from day 1. Love it. Be sure to drink lots of water throughout the day!
T
Tanya · September 26, 2026
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.