In 2012, I was pleasantly surprised to know that diabetes could be reversed to a very large degree in the vast majority of cases! This article contains pointers that I came across.
Dr Michael Greger
Dr Michael Greger has written an excellent book: How Not to Die (576 pages, 2015) which gets rave reviews at Amazon. He also makes delightful YouTube videos that summarize medical research on specific subjects. His on-stage mannerisms are rather funny, which makes his videos charming :)
Multiple Studies Showing REVERSAL of Type II Diabetes Through Diet
(7 mins, Aug 2014) If you have time to watch only one video, watch this one!
Tackling Diabetes with a Bold New Dietary Approach
A funny, informative, 18-minute TEDx Fremont talk from 2012.
Dr Gabriel Cousens
"Simply Raw" (90 mins, 2009)
Gabriel Cousens runs the Tree of Life Rejuvenation Center in Arizona, USA, where he has been treating type 2 diabetes for several decades now. In order to spread the word, his center created a documentary called (DVD) Simply Raw: Reversing Diabetes in 30 Days (92 minutes, 2009). Six patients with diabetes were tracked for 30 days as they lived at the Tree of Life Center. They followed Cousens' diet guidelines and daily exercise routines. Within days, all patients improved dramatically. All of them continued with their lifestyle changes beyond these 30 days.
Gabriel Cousens stands out from other doctors who advocate plant based diets in some respects. First, he is highly spiritual — his biography mentions that he is a physician, homeopath, family therapist, ayurvedic practitioner, chinese herbalist, Kundalini teacher, Jewish rabbi, shaman and Kabbalah student. He also studied at the Shaolin Temple in China. Wow! Second, Gabriel Cousens advocates far more raw food than others. Third, his writings tend to emphasize his personal experiences with treating patients instead of medical studies. He has written articles like Peace through a Sattvik Diet and Perspectives on Dairy where he explains why he advocates avoidance of dairy in the modern world even though it is advocated by ancient sattvik food guidelines.