Dietary copper restriction in Wilson's disease

Area of Science:

• Biochemistry
• Human Nutrition
• Gastroenterology

Background:

• Dietary copper restriction is a traditional recommendation for Wilson's disease (WD).
• Evidence supporting this dietary approach is limited, with no randomized controlled trials available due to disease rarity.

Purpose of the Study:

• To review current knowledge on copper absorption and regulation in humans.
• To assess the relevance and efficacy of dietary copper restriction in managing Wilson's disease.

Main Methods:

• Literature review summarizing studies on human copper absorption and WD management.
• Analysis of the relationship between dietary copper intake and absorption proportions.

Main Results:

• Copper absorption proportion decreases as dietary intake increases.
• Large quantities of high-copper foods are needed to significantly impact copper absorption.
• Dietary copper restriction is difficult to manage and can impair nutritional status.

Conclusions:

• Dietary copper restriction is generally unnecessary for stable Wilson's disease patients adhering to medical therapy.
• Exceptions include avoiding large amounts of shellfish and liver.
• Focus should remain on effective medical management and nutritional support.