11/17/2025
🥬 🌿 🍃 Let’s take a moment to talk about SPINACH, because it tends to spark a lot of debate in kidney nutrition 🥬 🌿 🍃
Although spinach is widely praised for being nutritious and packed with beneficial compounds, people with kidney concerns often stumble upon conflicting advice online that makes it seem risky.
So… what’s the truth? 👉💡
Spinach mainly raises questions because of two nutrients: potassium and oxalates.
1️⃣ Spinach and POTASSIUM
Spinach—especially when cooked—contains a significant amount of potassium.
But that doesn’t automatically make it off-limits for everyone with chronic kidney disease. Many individuals with CKD don’t need to restrict potassium, particularly when it comes from plant-based foods.
Even for those who do need to limit potassium due to high blood levels, spinach can often fit into the diet in modest portions. Raw spinach, in particular, tends to contribute less overall.
I once had a patient tell me they removed every spinach leaf from their mixed greens just to be careful. In most cases, there’s really no need to go that far.
2️⃣ Spinach and OXALATES
Spinach is also rich in oxalates. But once again, that doesn’t mean everyone with kidney issues must avoid it.
There’s a lot of hype—fueled partly by certain popular books—suggesting oxalates are universally harmful. Current research doesn’t support such broad claims.
Who actually needs to be cautious?
People prone to calcium oxalate kidney stones may need to be more mindful of very high-oxalate foods.
Even then, the need to reduce oxalate intake varies from person to person and depends on factors like the results of a 24-hour urine test. So there’s no universal rule.
🔬 The bottom line 🧑⚕️
If spinach leaves you feeling uncertain, you’re not alone. There are many moving pieces to consider, and the best answer depends on your labs, your medical history, and your individual dietary needs.
A consultation with a renal dietitian can help clarify whether spinach is appropriate for you and in what amount. When it comes to kidney health, individualization is everything—there’s no one-size-fits-all blueprint.
For more in-depth information and helpful recipes, take a look at "The Easy Renal Diet to Avoid Dialysis".