The American Academy of Pediatrics has just published the first-ever treatment guidelines for treatment of type 2 diabetes in children and teens under 18. An excerpt from a pertinent article at MedPageToday:
Most pediatric patients newly diagnosed with type 2 diabetes should receive metformin along with a program of lifestyle modification covering diet and physical activity, according to the guideline, authored by an AAP committee headed by Kenneth Copeland, MD, and Janet Silverstein, MD.
The committee made two exceptions: children and teens presenting with ketosis or diabetic ketoacidosis and “in whom the distinction between types 1 and 2 … is unclear,” and those with blood sugar levels of at least 250 mg/dL or glycated hemoglobin (HbA1c) higher than 9%.
Lifestyle modification includes exercising at least an hour a day, and limiting screen time to two hours daily.
PS: My practice is limited to adults.
Diabetic Mediterranean Diet 
I have a question for you, have you read Blood Sugar Solution by Dr. Hyman, if so what did you think about it?
I read it and here’s what I thought: https://diabeticmediterraneandiet.com/2012/03/02/book-review-the-blood-sugar-solution/
-Steve