about gut bacteria

abdomen about acidophilus anatomy anxiety bacillus bacteria bacterium belly blackboard bowel brain chalk chronic colon depression diagnosis dietary digestion digestive fermented flora food gastrointestinal good growth gut guts healing health illustrated illustration inflammation interaction intestinal intestine kefir lactobacillus medicine mental microbiome microorganism microorganisms mood old oxytocin paper probiotic probiotics psychiatry psychic stomach stress supplements system tract white yeast