The data regarding aging and gastric acid secretion is
inconclusive, as early studies were likely confounded by
the presence of H pylori in some persons. Achlorhydria
or hypochlorhydria may result from atrophic gastritis,
as a result of the use of medications such as proton
pump inhibitors, or as a result of H pylori infection[42-44].
This reduction in gastric acidity may increase the risk of
small bowel bacterial overgrowth, potentially leading to
malabsorption[