Walnuts are generally beneficial for your health. They are high in omega-3 fatty acids which improve memory, improve heart health, and boost brain power, say the experts at UC Davis Health. Eating walnuts also encourages healthy gut bacteria and may even prevent certain cancers.

However, consuming walnuts can be dangerous for people who have kidney disease. According to Parade, individuals with advanced-stage chronic kidney disease (CKD), as well as those on dialysis, need to limit or avoid walnuts.

Walnuts contain phosphorus and potassium, which can be toxic if consumed in large amounts. People with CKD can’t process these nutrients well and run the risk of having excessively high levels in their bodies.

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