Adrenal Fatigue

The book emphasizes adrenal fatigue as a widespread concern, but I'm curious what prompted the author to explore this topic now. Was there a specific trend or research that sparked this focus?

The practical advice sounds helpful, but I wonder how sustainable these changes are for people with busy lives or limited resources. Has anyone tried these tips long-term?

There are many overlapping symptoms with other health issues—what makes adrenal fatigue distinct in the author's view, and how reliable are the diagnostic criteria?