## **Core Concept**
Anemia of chronic disease (ACD) is a condition characterized by a decrease in red blood cell production in response to chronic inflammation or disease. Hepcidin, a liver-produced hormone, plays a crucial role in regulating iron metabolism by controlling iron absorption and release from stores.

## **Why the Correct Answer is Right**
In ACD, the body typically exhibits increased levels of hepcidin. This increase is a response to the inflammatory cytokines produced during chronic disease or inflammation. Elevated hepcidin levels lead to decreased iron availability for erythropoiesis (red blood cell production) by reducing iron absorption from the gut and decreasing the release of iron from macrophages and other storage sites. This mechanism contributes to the development of anemia, as there is not enough iron to produce adequate amounts of hemoglobin for new red blood cells.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it suggests a decrease in hepcidin levels, which is more characteristic of iron deficiency anemia, not anemia of chronic disease.
- **Option B:** This option is incorrect because it implies no change in hepcidin levels, which does not align with the body's response to inflammation in ACD.
- **Option D:** This option is incorrect because it suggests an even higher increase than the correct option, which, while indicating an understanding that hepcidin increases, does not accurately reflect the specific changes seen in ACD.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that hepcidin levels are increased in anemia of chronic disease due to inflammation, which leads to reduced iron availability and contributes to the anemia. This contrasts with iron deficiency anemia, where hepcidin levels are typically low.

## **Correct Answer:** C. Increases.