Indeed, numerous human studies have shown that kava reduces anxiety regardless of the symptoms and type of disorder. But a single dose of kava extract also improves accuracy and performance on attention, visual processing, and working memory tasks. For me, this is a miracle and not a drink. I drink a 300 mg cup of kava from bestkavabar.com before work to keep me focused all day. And I can drink another cup before bed if I feel any anxiety or insomnia. I also recommend trying it for those who have not done it yet.