It’s only one single letter, but science says it’s the most universally dreaded text message you could send or receive.

There’s evidence that CBD can offer some help to people who have anxiety or depression. But very little research has been done, and there’s plenty of reason to proceed with caution.

Anxiety and depression frequently occur and often coexist in patients with Parkinson disease (PD; Box 1).In such individuals, the lifetime risk of developing depression or anxiety is ≈60%, with ...