No supplement is intended to treat, cure, or prevent disease. Researchers have studied L-theanine's effects for several conditions. However, it's important to note that better-designed clinical ...

While there is little research on the connection between L-theanine and bipolar disorder in particular, it has been shown to have beneficial effects on other mood disorders.

L-theanine is also present ... Some people can be sensitive to caffeine, and if you’re impacted by any side-effects such as digestive issues, anxiety or impaired sleep, you may want to choose ...