GI Loss and Low Iron
Gastrointestinal losses account for a substantial proportion of iron deficiency by multiple mechanisms.
Stress in excess amount has deleterious effects in your body. Increased stomach acid production due to prolonged stress can affect absorption of minerals and vitamins in addition to potentially leading to microscopic bleeding if ulcers develop.
Helicobacter Pylori is a bacteria resident on the stomach lining thought to be related to dysbiosis of intestinal mucosa.
Other less common causes of GI loss include, autoimmune gastritis, celiac disease or gluten sensitivity, after bypass or other weight loss surgeries, obscure parasitic infections or colon cancer.