What Foods Should I Avoid with Wilson Disease?

If you have Wilson disease, you will need to limit your copper intake, but the strictness of your diet depends on what phase of treatment you are in. During your initial “de-coppering” phase, you will need to strictly avoid high-copper foods like organ meats, shellfish, chocolate, nuts, and mushrooms. You should also evaluate hidden sources of copper in your home, like tap water and cookware. Once your copper levels are stabilized in the maintenance phase, your doctor may allow you to slightly relax these restrictions. However, diet is only a helper—it can never replace your daily life-saving medications.

Initial Treatment vs. Maintenance Phase

Treatment for Wilson disease happens in phases, and your diet changes along with them:

• The Initial De-coppering Phase: This usually lasts for the first year of treatment. Because your body has accumulated dangerous levels of toxic copper, you must be extremely strict about avoiding high-copper foods ^[1][2].
• The Maintenance Phase: Once your copper stores have been safely reduced, you enter the maintenance phase. At this point, your doctor may allow you to occasionally enjoy small amounts of foods like chocolate or nuts, as long as your overall daily copper intake stays low ^[1]. In fact, if your diet is too restrictive during maintenance—especially if you take zinc therapy—you could accidentally develop a cytopenia (a low blood cell count) due to a treatment-induced copper deficiency ^[1].

High-Copper Foods to Watch Out For

While no food exchange plan works for everyone, medical experts agree that you should limit or avoid foods naturally highest in copper ^[3][2]. These include:

• Organ meats: Liver, kidney, and brain are very high in copper.
• Shellfish: Oysters, crab, and lobster.
• Nuts and seeds: Walnuts, cashews, sunflower seeds, and peanuts.
• Chocolate and cocoa: Dark chocolate has particularly high levels of copper.
• Mushrooms
• Certain legumes: Soybeans, lentils, and dried beans.

Note for Vegetarians/Vegans: Because many plant-based staples (soy, lentils, beans, nuts, seeds) are naturally high in copper, it can be challenging to get enough protein without exceeding your copper limits. Ask your doctor for a referral to a registered dietitian to help you plan safe, balanced meals ^[2].

What You CAN Eat (Low-Copper Foods)

Being told what you cannot eat can feel overwhelming, but there are many delicious foods that are naturally low in copper and generally safe for everyday eating ^[2]. These often include:

• Most fresh fruits and vegetables (except mushrooms)
• Dairy products like milk, cheese, and yogurt
• Beef, poultry, and pork
• Refined grains, such as white rice and pasta made from refined flour

Hidden Sources of Copper: Water, Cookware, and Supplements

Many patients focus entirely on food and forget about other ways copper sneaks into the body ^[4].

• Tap water: Tap water can carry significant amounts of copper, especially if you live in a house with older copper plumbing ^[4]. Have your water tested for copper. If the concentration is above 0.1 parts per million (0.1 mg/L), you should use an alternative water source for drinking and cooking ^[4]. Check the nutrition labels on bottled or mineral waters, too, as some contain trace amounts of copper.
• Flushing the pipes: If you have copper pipes, let the cold water run for a minute or two before using it, as water that sits in the pipes overnight absorbs more copper. Standard pitcher filters do not always remove copper; you may need an approved reverse osmosis system.
• Copper Cookware: Do not cook with unlined copper pots and pans. Acidic foods can cause the copper to leach directly into your meal.
• Multivitamins and Supplements: Always check the labels on over-the-counter vitamins. Many daily multivitamins contain copper, which can be dangerous for someone with Wilson disease.

Diet is a Helper, Not a Cure

It is crucial to remember that a low-copper diet is only a supplementary tool, not a standalone treatment ^[5][6]. Wilson disease is a genetic condition that requires lifelong medical therapy using chelating agents (to pull copper out of your tissues) or zinc salts (to block your body from absorbing copper) ^[4][5]. No diet can replace these medications ^[7].