What is the strongest herb for anxiety?

I'm curious to know, what herb is considered to be the most effective for managing anxiety symptoms? Is there a particular plant or botanical extract that has been widely studied and recommended by experts for its calming and anxiety-reducing properties? Are there any scientific studies or clinical trials that support the use of this herb for anxiety relief? Additionally, are there any precautions or potential side effects that individuals should be aware of before incorporating this herb into their routine?