Julie Guider, M.D.

Learn how large intestine function includes water and electrolyte absorption, gut bacteria, stool formation, storage, and elimination.

Learn small intestine function, from the duodenum, jejunum, and ileum to enzymes, bile, villi, nutrient absorption, and food movement.

Learn how gut barrier function works, what increased intestinal permeability means, and how fiber, diverse plants, and sleep may support it.

Learn what the gastrocolic reflex is, why eating triggers bowel activity, what intensifies it, and practical ways to calm post-meal urgency.

Learn how digestive enzymes break down food, where each is made, how lactase deficiency and pancreatic insufficiency differ, and when supplements help.

Learn what bowel transit time means, what can speed or slow digestion, and how to observe your transit pattern at home or discuss clinical testing.

Learn bowel movement basics, from how stool forms to normal frequency, color, shape, and habits worth tracking for better digestive awareness.

Learn digestive system basics, from the organs that break down food to gut movement, nutrient absorption, waste removal, and meal timing.

Learn yellow diarrhea causes, from food and fast transit to fat malabsorption, plus a symptom self-check and signs to seek medical care.

Learn sulfur burps causes, from sulfur-rich foods and GLP-1 medicines to reflux and infections, plus relief steps and signs to seek care.