04/17/2026
Gone are the days of "no whole grains" on a kidney diet! In defense of whole grains for kidney health:
Yes, they are slightly higher in phosphorus, but that phosphorus isn't well absorbed. They are also higher in potassium, but the added benefit of fiber means you excrete more potassium in your 💩! There is NO data linking whole grains with higher potassium levels. In fact, a fascinating paper was just published in Feb 2026 attributing the LACK of whole grains as a sizeable CAUSE of kidney disease worldwide.
Whole grains are also slightly higher in oxalate, but many people with kidney stones don't need to limit oxalate. Even those who do, the benefits of whole grains MASSIVELY outweigh the risks of the higher oxalate content. In fact, the TYPE of oxalate found most in whole grains is insoluble, making it less of a concern.
Whole grains are an important source of fiber and many minerals and vitamins in our diets. They help control blood sugar and promote heart and gut health!
🥳 Yay for whole grains! And for all of the tasty options!
PMID: 41798836