Theanine is an amino acid supplement that promotes relaxation and can improve sleep quality. It enhances the speed at which one falls asleep and the ability to stay asleep, facilitating deeper stages of restorative sleep.
I've talked about threeparticular supplements, magnesium threonate,apigenin, and theanine, which together can really enhance the speed at which one falls asleep and people's ability to stay asleep and to really get intothose deep stages of sleep that are particularly restorative.
""Huberman mentions theanine as a key supplement for improving sleep, noting its ability to enhance sleep speed and depth."