Dietary iron overload disease

Dietary iron overload disease, also known as African iron overload or Bantu siderosis, is a condition characterized by excessive accumulation of iron in the body resulting primarily from the consumption of large quantities of iron-rich traditional home-brewed beverages, particularly those fermented in iron pots or drums. This condition has been predominantly described in sub-Saharan African populations. While the primary driver is dietary iron excess, there is evidence suggesting that a genetic susceptibility factor (distinct from the HFE gene mutations responsible for hereditary hemochromatosis) may contribute to the development of iron overload in affected individuals, as not all people exposed to the same dietary iron load develop the disease. The excess iron accumulates in multiple organs, particularly the liver, spleen, bone marrow, and pancreas. Over time, iron deposition in the liver can lead to hepatic fibrosis and cirrhosis, portal hypertension, and an increased risk of hepatocellular carcinoma. Iron loading in other organs may result in diabetes mellitus, cardiomyopathy, and osteoporosis. Patients may present with hepatomegaly, abdominal pain, fatigue, and signs of liver dysfunction. Ascorbic acid (vitamin C) deficiency is also commonly observed due to oxidative degradation by excess iron. Treatment primarily involves reducing dietary iron intake by avoiding iron-rich traditional beverages and foods prepared in iron containers. Phlebotomy (therapeutic blood removal) may be employed to reduce body iron stores, similar to the approach used in hereditary hemochromatosis. Iron chelation therapy may be considered in cases where phlebotomy is not feasible. Management of complications such as liver disease, diabetes, and heart failure is also an important component of care. Early identification and dietary modification can help prevent progression to irreversible organ damage.

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