Regarding the intake of nuts in CKD patients, which is often prohibited for fear of an excessive intake of phosphorus and potassium, a recent randomized crossover trial showed that 30 g of walnuts per day in this population led to reduced blood pressure, LDL cholesterol, and albumin excretion, but had no effect on the physiological levels of phosphorous, potassium, PTH, and FGF23 [168]. This evidence concerns the gene FGF23 and chronic kidney disease.