15 Best Foods for Kidney Health
Buckwheat

Many whole grains are high in phosphorus but buckwheat and other grains like barley are not. Buckwheat is a gluten-free grain that is highly nutritious, containing vitamin B, magnesium, iron, and fiber.
Popcorn and wild rice are other whole grains safe to incorporate into a renal diet. A 2002 study found that buckwheat inhibits the progression of renal failure.