This week we interview "Dr. B," Dr. Will Bulsiewicz. Dr. B is a graduate of Georgetown University School of Medicine. He trained in internal medicine at Northwestern Memorial Hospital and gastroenterology at The University of North Carolina Hospitals. He also earned a Master of Science in Clinical Investigation (MSCI) from Northwestern University and a certificate in nutrition from Cornell University. Dr. Bulsiewicz is board-certified in both internal medicine and gastroenterology.To find out more about Dr. B, head to https://theguthealthmd.com.We discuss:What does bacteria matter so much?What bacteria is considered 'bad' bacteria? How do remove those?What are the thoughts around testing for food sensitivities?Studies mentioned in the episode:How diet impacts gut microbiome: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5385025/Benefits of substituting whole grains for processed grains:https://www.ncbi.nlm.nih.gov/pubmed/28179226https://www.sciencedaily.com/releases/2017/02/170208151337.htmGluten free diet reduces short chain fatty acids and damages gut microbiome:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3023594/