L-Theanine is an amino acid found in green tea and has properties which prevent anxiety, aiding sleep patterns.

By boosting serotonin levels, lowering brain chemicals which cause stress or anxiety and improving alpha brain waves, L-Theanine acts as a relaxant whilst also improving focus and creativity.

Links to other interesting documents and articles…

https://www.thesleepdoctor.com/2017/07/11/understanding-l-theanine-sleep-better-night-feel-relaxed-alert-day/

https://www.purenootropics.net/l-theanine/l-theanine-for-sleep/