Current scientific research on Human gut bacterium (KLE1738) reveals possible connection to depression.1. Sources can be scientific journals or articles, peer review article or sceientific paper. Journals can be used from websites “Science”, “Science News”, Scientific American”, “Nature”, “Preventive Medicine”, and ther health medical journals. 2. Include Scientific content that is relevant and legitimate information that supports purpose with in-depth scientific analysis. 3. Use Current scientific research that shows in-depth analysis and shows important insights.