Erica Sonnenburg, Ph.D. Erica Sonnenburg, Ph.D., is a senior research scientist in the Department of Microbiology and Immunology at the Stanford University School of Medicine. Her research focuses on the role of diet on the human gut microbiota. Experience She has published several peer-reviewed articles in well-respected scientific journals about her studies on the gut microbiota. She is the co-author of the book The Good Gut: Taking Control of Your Weight, Your Mood, and Your Long-term Health. About Parents Parents, a Dotdash Meredith Brand, is an award-winning online resource for trustworthy, empathetic, and supportive information and inspiration for your families. We reach 9 million readers a month. Our content is written by experienced journalists, fact checked, and reviewed by our Expert Review Board for accuracy. Learn more about us and our editorial guidelines.