Good add, Elizabeth. The Mayo Clinic Diet book and/or program are great resources. Here's a good discussion that might be worth reigniting:
- Anyone know about Mayo Clinic Diet Experience https://connect.mayoclinic.org/discussion/anyone-know-about-mayo-clinic-diet-experience/

I'd also like to point out this book from diabetes experts at Mayo Clinic - The Essential Diabetes Book https://mcpress.mayoclinic.org/categories/diseases-and-conditions/mayo-clinic-the-essential-diabetes-book-second-edition.php