Omeprazole is often seen as something simple and safe, but continuous use—especially without medical supervision—can have important health consequences. By chronically suppressing gastric acid production, the medication interferes with essential digestive functions. Stomach acid is not only meant to “burn” food: it is fundamental for proper digestion, nutrient absorption, and defense against microorganisms. With prolonged and indiscriminate use, effects such as deficiencies of vitamin B12, iron,