Ever the popular wellness crank, Dr. Joseph Mercola is a great example of pseudojournalism. He loves to tout the magical control the microbiome has over every aspect of human health. A cynical person might note that this microbiome hype plays nicely into the products he sells. According to articles on his website, your gut bacteria are responsible for obesity, diabetes, depression, autism, anxiety, schizophrenia, cancer, asthma, and arthritis, among other random ailments. The solution? Buy his book!