Vegetarians and vegans are often motivated to avoid animal products out of concern for animal welfare and the environment. Lierre Keith is no exception. As a teenager, she became convinced that abstaining from meat was the best choice. However health concerns quickly ensued once she made that dietary choice. She began to suffer from fatigue, hypoglycemia, irregular menstrual cycles, anxiety, depression, insomnia, and more. These initial conditions were followed by longer-term problems including autoimmune and degenerative disc disease. Her own health concerns, and those of others, led her to reexamine vegetarianism. Today, Lierre is passionate and bold when discussing our need for including meat products in our diet, both for our benefit and for the health of the planet.