Good luck with that! I did my own research and crafted my own diet. There are plenty of resources on the internet, they are somewhat difficult to find for those with low functioning kidneys (and not on dialysis). One thing is for sure, the dieticians in the clinics don't understand diets for low functioning kidneys. They have plenty of suggestions if you are on dialysis, but low functioning kidneys are not their thing. And frankly, if you're even on dialysis but doing your best to preserve your residual function they can't help much. As an example, telling you to load up on animal-based protein (especially red meat) is not something that will help your residual function. That has been my experience, anyway.