Matthew Lederman, MD, is a board-certified internal medicine physician specializing in nutrition and lifestyle medicine. He lectures for the eCornell T. Colin Campbell Certificate Program in Plant Based Nutrition and appeared in the films Healing Cancer From the Inside Out and Forks Over Knives. Along with Alona Pulde, he cofounded Transition to Health: Medical, Nutrition, and Wellness Center and coauthored Keep It Simple, Keep It Whole and The Forks Over Knives Plan.