H. pylori Explained Helicobacter pylori (H. pylori): What It Is, How It Affects Digestion, and Why Gut Balance Matters Understanding a Common but Often Overlooked Digestive Bacteria Helicobacter pylori (H. pylori) is a spiral-shaped, gram-negative bacterium that commonly inhabits the stomach and upper small intestine. It is one of the most well-studied bacteria in digestive health due to its association with chronic inflammation of the stomach lining and its potential role