Understanding Oxalates

A quick, balanced explainer — not a warning.

Oxalates come up a lot when people talk about leafy greens, so here's the honest, non-alarming version of what they actually are.

What They Are

Oxalates (or oxalic acid) are naturally occurring compounds found in a wide range of plant foods — spinach, beets, nuts, chocolate, and many leafy greens included. They're a completely normal part of a plant-based diet, not a contaminant or a red flag.

Why Some People Pay Attention to Them

In the gut, oxalates can bind to minerals like calcium, which affects how much of both gets absorbed. For most people, this isn't something to think twice about. But for people prone to calcium-oxalate kidney stones, or with certain digestive conditions, a healthcare provider may recommend keeping an eye on oxalate intake. It's a small-population consideration, not a general health risk.

Pairing Oxalates With Calcium

Here's the interesting part: eating oxalate-containing foods alongside a calcium source (dairy, for instance) can actually be helpful. The calcium and oxalate bind together in the digestive tract before they're absorbed, so more of the oxalate passes through the body instead of being taken up. It's part of why a dish like ours pairs kale with goat cheese — it's a natural, practical combination, not an accident.

Does Kale Variety Matter?

Yes, somewhat. Lacinato (dino) kale generally tests lower in oxalates than curly kale, and cooking methods that involve water — boiling especially — further reduce oxalate content. It's one of several small reasons we choose the variety and prep we do.

The Bottom Line

For the vast majority of people, oxalates aren't something to avoid or worry about — leafy greens are still one of the best things you can eat. If you have a history of kidney stones or a condition your doctor has told you to manage with diet, it's worth a conversation with them about what's right for you specifically. This page is educational, not medical advice.