Always craving junk food? Now you can blame it on the millions of bacteria that live in your gut - At least that's what some researchers from UC San Francisco, Arizona State University and University of New Mexico, have concluded after reviewing the latest scientific literature about microbes. According to Athena Aktipis, one of the authors of the study, which was published in the journal Bio Essays in mid-August, these microscopic organisms are extremely bossy and have the power to influence not just our food cravings but also moods and overall well-being.