Oat Milk and Oxalates: A Low Oxalate Swap, but Not Always a Healthy One

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Oat milk has taken over coffee shops, and for anyone cutting oxalate, that is genuinely good news.

It is in the lattes, the cereal bowls, and the smoothies. And unlike almond milk, oat milk is one of the lowest oxalate milks you can pour, which makes it the easy, creamy swap.

There is a catch, though, and it has nothing to do with oxalate. Oat milk’s healthy reputation is a little oversold, because a lot of brands are built on added oils and sugar.

This post covers whether oat milk is high in oxalate, why it is not automatically a health food, and how to pick a cleaner carton.

Is oat milk high in oxalate?

No. Oat milk is low in oxalate, one of the lowest of the plant milks, alongside coconut and flax milk. Oats themselves sit in the low to moderate range, and once they are blended with water and strained into milk, what is left in your glass is low.

That puts it in a completely different place from almond milk, the highest oxalate plant milk, at up to 27 mg per cup. If you are swapping away from almond milk, oat milk is the closest match in taste and texture.

For most people watching oxalate, oat milk is a safe everyday pour in coffee, cereal, and smoothies.

The catch: oat milk is not always the healthy choice

Here is the part the marketing skips. Many popular oat milks are not just oats and water. A lot of them, including some of the biggest names, list rapeseed oil, which is simply another name for canola oil, added to make the milk creamy.

On top of that, some brands add sugar, and many contain gums for texture. None of this changes the oxalate picture, but if you reached for oat milk because it sounded healthy, a carton can be closer to a processed drink than a whole food.

A note from me

I am not here to scare you off oat milk. On a low oxalate diet it is one of the friendliest swaps you can make, and I use it happily.

I just want you to buy it with your eyes open, because that healthy halo does a lot of heavy lifting on the carton. A two second label check gets you the good version.

How to pick a better oat milk

Cleaner oat milks do exist. You just have to read the label:

• Choose unsweetened. This alone cuts the added sugar.
• Check for oil. The simplest oat milks are just oats, water, and a pinch of salt, with no added rapeseed or canola oil. Some minimal-ingredient and low-fat versions leave it out entirely.
• Skip the barista and flavored lines if you want the lightest option, since those are usually the sweetest and richest.
• Or make your own. Blend oats with water, add a pinch of salt, and strain. It takes a few minutes, has no added oil, and is still low in oxalate.

Oat milk vs almond milk for oxalate

If you are choosing between the two, oat milk wins for a low oxalate diet. Almond milk is high in oxalate, at up to 27 mg per cup, while oat milk is low.

For coffee and cereal, oat is also the closer match to dairy in taste and texture. The one edge almond milk has is that unsweetened versions tend to be lower in sugar, so if you go oat, choosing unsweetened keeps both boxes checked.

Clean oat milk brands to look for

These oat milks skip the added oil and gums. They are just oats, water, and a little salt, and they are all low in oxalate, which makes them the cleaner pick on both counts:

• MALK Organic Oat Milk — filtered water, organic oats, pink salt. No oils, gums, or fillers.
• Mooala Organic Simple Oat Milk — organic oats, water, pink salt. Sold in shelf-stable multi-packs.
• Califia Farms Organic Oat Milk — purified water, organic oats, sea salt.
• Oatly Super Basic Oatmilk — oats, water, sea salt, citrus fiber. This is Oatly’s only oil-free line; their regular oatmilk has rapeseed oil.
• Willa’s Unsweetened Oat Milk — water, organic oats, vanilla, salt.
• Elmhurst Milked Oats — oats and water, with no added gums or oils.

So is oat milk a good choice?

For oxalate, yes, oat milk is one of the best swaps you can make. Just do not assume the carton is automatically healthy.

Reach for an unsweetened oat milk with no added oil, or make your own, and you get the low oxalate creamy latte without the added seed oil and sugar.

Frequently asked questions about oat milk and oxalate

Is oat milk high in oxalate?

No. Oat milk is low in oxalate, one of the lowest of the plant milks, which makes it a good swap for high oxalate almond milk.

Is oat milk healthy?

For oxalate, yes. But many brands add rapeseed (canola) oil and sugar, so oat milk is not automatically a health food. Choose an unsweetened version with no added oil, or make your own.

Does oat milk contain canola oil?

Often, yes. Many oat milks list rapeseed oil, which is simply another name for canola oil, added to make the milk creamy. Minimal-ingredient and some low-fat versions skip it.

Is oat milk better than almond milk for kidney stones?

For oxalate, yes. Oat milk is low in oxalate while almond milk is high, so oat milk is the safer pour for people who form calcium oxalate stones.

Read these next

• Is almond milk high in oxalate? The high oxalate milk that oat milk replaces.
• Is coffee high in oxalate? Good news for your morning cup, plus the lattes to watch.
• The low oxalate foods list A full reference for what is safe and what to limit.

Sources

• Plant-Based Milk Alternatives and Risk Factors for Kidney Stones and Chronic Kidney Disease. Journal of Renal Nutrition (2021), via ScienceDirect. Oat, coconut, and flax milk measured low in oxalate; almond milk highest.
• Oatly. Product ingredient lists, which include low erucic acid rapeseed oil (canola oil); the Low Fat and Super Basic versions omit added oil.

The information on this site is for educational purposes only and is not intended as medical advice. Oxalate sensitivity and related conditions vary significantly between individuals. Always consult your healthcare provider before making significant dietary changes or starting any supplementation, especially if you have kidney disease, a history of kidney stones, or any other diagnosed health condition. Read our full medical disclaimer for more information.