system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 63-year-old female enrolls in a research study evaluating the use of iron studies to screen for disease in a population of post-menopausal women. Per study protocol, past medical history and other identifying information is unknown. The patient's iron studies return as follows:

Serum iron: 200 µg/dL (normal 50–170 µg/dL)
TIBC: 220 µg/dL (normal 250–370 µg/dL)
Transferrin saturation: 91% (normal 15–50%)
Serum ferritin: 180 µg/L (normal 15-150 µg/L)

Which of the following is the most likely cause of these findings?
assistant
Excess iron absorption