Dietary Lacks
Not eating enough animal products like meat, eggs, or dairy, which are rich in vitamin B12.
Digestive Issues
Problems with the stomach or intestines can hinder B12 absorption.
Pernicious Anemia
An autoimmune condition where the body can't absorb B12 even if it's present.
Age
Elderly people may have reduced stomach acid, impacting B12 absorption.
Medications
Certain drugs, like acid reflux meds, can interfere with B12 absorption.
Malabsorption Disorders
Conditions like celiac disease or Crohn's affect nutrient absorption, including B12.