Dr. Alan started his plant-based lifestyle in 2012 after attending a T. Colin Campbell lecture that led to his book The China Study. After reading that book, Dr. Alan read numerous other books by members of the plant-based community, including Caldwell Esselstyn, Garth Davis, John McDougall, Michael Greger, and many others. He then attended conferences at Plantrician in 2016 and 2018. Last year, Dr. Alan sat for his lifestyle medicine boards and is now currently certified.

Dr. Alan has practiced internal medicine since 1999 and has been with UC Davis since 2003. He's presented cases to colleagues showing dramatic health turnarounds, especially in chronic diseases including diabetes, hypertension, and obesity. He feels this way of healing is more rewarding.