Are Potatoes High in Oxalates? What Cooking Changes

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Potatoes seem like the most innocent food on the plate.

Plain, beige, humble, the opposite of a trendy superfood. So it surprises people to learn that the everyday potato can carry a meaningful amount of oxalates, and that how you cook it changes the answer quite a bit.

The good news is that this is not a simple yes-or-no food. Variety, preparation, serving size, and the source of the data all matter. That can make potato lists look contradictory, but it also means you have practical choices.

This post will help you compare potato types, understand what cooking changes, choose a sensible portion, and find an easier alternative when potatoes do not fit the rest of your day. You can also check any specific food in the Food Look-Up tool before you build a new habit around it.

Are potatoes high in oxalates?

Potatoes are not consistently low in oxalates. Some preparations can contribute a meaningful amount, especially when the serving is large. But there is no single number that tells the whole story.

A 2023 review of food oxalate research used potatoes as a clear example of how cooking method changes the reported result. The same review also explains why numbers for one food can differ between studies. Growing conditions, sample preparation, extraction, and testing methods can all affect the value.¹

That is why I do not want you planning your entire day around one number pulled from one list. Use a reliable food reference, compare the same serving size, and pay attention to how the potato was prepared. If a list does not tell you whether the potato was boiled, baked, or fried, it is missing an important part of the answer.

Do different potato varieties have different oxalate levels?

They can, but the research is not consistent enough to give you a neat ranking of russet, red, yellow, and white potatoes that will work in every kitchen.

Variety matters, but so do the soil, growing conditions, maturity, storage, cooking method, and laboratory method. A russet from one source may not match a russet tested somewhere else. That is why a confident chart that declares one regular potato variety safe and another unsafe can promise more certainty than the data gives us.

Potato, Sweet Potato, Rutabaga, or Cauliflower?

Regular potato

If you want a regular potato, peel it, cut it into pieces, boil it in plenty of water, and drain it well. Portion still matters, but preparation gives you more control.

Sweet potato

Sweet potatoes are consistently very high in oxalates, so it is best to avoid them on a low oxalate diet. They are not a lower-oxalate substitute for regular potatoes.

Rutabaga or cauliflower

Rutabaga is my favorite low oxalate swap for roasting and crisping. For mashed potatoes, cauliflower is my favorite alternative.

How does cooking change the oxalate content of potatoes?

This is where potatoes become much more practical. Your cooking method genuinely matters.

Boiling gives soluble oxalates somewhere to go. In a peer-reviewed study of vegetables, boiling reduced soluble oxalates more effectively than steaming. The oxalates that left the vegetables were recovered in the cooking water, which is why draining that water matters.²

Baking does not do the same job. In that study, baking potatoes did not produce a measurable loss of oxalates. Baking removes moisture, but there is no pot of water to carry soluble oxalates away.²

Frying can make the portion harder to judge. Fried potatoes lose water and are easy to eat in a larger amount. Reviews report different values for boiled, baked, fried, and chipped potatoes, which is another reason the preparation listed beside the number matters.¹

Peeling matters more than it may seem. Most of a regular potato’s oxalates are concentrated in and near the skin, so peeling removes the higher-oxalate outer portion. It does not make the potato oxalate-free, and the exact reduction varies by potato and preparation.

What I Would Do With Potatoes at Home

Potatoes are normally High in oxalates. If I want them, I keep the preparation simple so I can reduce what I can:

1. Peel them. Most of the oxalates are concentrated in and near the skin, so this removes the higher-oxalate outer portion.
2. Cut them into pieces before boiling. This exposes more of the potato to the water.
3. Boil them in plenty of water. This gives soluble oxalates a way to move out of the potato.
4. Drain and discard the cooking water. Do not reuse it in soup or gravy.
5. Finish them after boiling if you want crisp edges. Once drained, the potatoes can go into a skillet, air fryer, or oven.

This does not make potatoes oxalate-free, and portion still matters. But it gives you more control than baking a whole potato with the skin or reaching for french fries.

If you want to follow the whole method from start to finish, make my Low Oxalate Duck Fat Home Fries. The peeled cubes boil for a full 8 minutes in plenty of water, then drain and steam-dry before they reach the skillet. Duck fat helps the home fries develop extra-crisp, browned edges.

A note from me, before we get practical

I like that potatoes are a food I can keep, with a little care, rather than one I have to grieve. This post is less about a dramatic swap and more about technique. A few quiet choices in the kitchen can make a potato easier to work into a low oxalate day.

I also do not think you need to memorize a stack of competing food lists. Learn what changes the answer, check the preparation and portion, and choose the version that fits your day.

How do you prepare potatoes for a lower oxalate meal?

Use the method above, then look at the portion in front of you.

One of my favorite ways to use this preparation is in my Low Oxalate Home Fries (Crispy Skillet Potatoes). The peeled potato cubes are boiled first, then dried thoroughly and browned in duck fat—or ghee—for crisp edges and tender centers.

Portion still matters. A larger serving brings more oxalates than a smaller serving, even when both were cooked the same way. The right amount for you depends on the rest of your meal, the rest of your day, and any guidance you have from your healthcare provider.

If portion sizes and conflicting food lists are where you get stuck, read The Low Oxalate Foods List: What You Can Actually Eat. It will help you look at the whole day instead of treating one food as the entire plan.

What can you eat instead of potatoes?

Sometimes you want potatoes. Sometimes you want a starch you do not have to think so hard about.

White rice is the simple alternative I reach for most often. It is low oxalate, neutral enough to go with almost anything, and easy to portion. If you want a reliable method, make my Low Oxalate Instant Pot White Rice.

For other ideas, use the Food Look-Up tool to check the specific food and preparation you have in mind. Do not assume every root vegetable is interchangeable with a potato. Foods that look similar can have very different oxalate content.

Choose the Replacement Based on the Job

Choose the replacement based on what you wanted the potato to do. One important reminder: sweet potatoes are not the lower oxalate answer. They are consistently very High in oxalates in my system, so I recommend avoiding them.

If you want a recipe you can make now, the Low Oxalate Recipe Index is the best place to keep exploring. I will add more job-specific potato alternatives as those recipes are ready.

So are potatoes off the table?

No. Potatoes are not a simple free food, but they are not automatically off the table either.

The version matters. The portion matters. The rest of the day matters. When I want potatoes, I use the most practical preparation I know: peel if needed, boil in plenty of water, drain, and serve a portion that works with the rest of the meal. When I want zero fuss, I reach for white rice.

Frequently asked questions about potatoes and oxalates

Are potatoes high in oxalates?

Potatoes are not consistently low in oxalates, but the answer depends on the type, serving size, preparation, and source of the data. A baked or fried potato is not the same calculation as a boiled potato. Check the preparation beside any number you use.

Does boiling potatoes lower oxalates?

Boiling can lower soluble oxalates because some move from the potato into the cooking water. Drain that water when the potatoes are done. A peer-reviewed cooking study found boiling more effective than steaming for reducing soluble oxalates, while baking potatoes did not show a loss.²

Are baked potatoes higher in oxalates than boiled potatoes?

Baking does not provide water for soluble oxalates to leach into, and one controlled study found no oxalate loss when potatoes were baked. Boiling and draining is the better-supported preparation when your goal is to lower soluble oxalates.²

Does peeling a potato remove all the oxalates?

No. Most of a regular potato’s oxalates are concentrated in and near the skin, so peeling removes the higher-oxalate outer portion. The flesh still contains oxalates. I peel, cut, boil in plenty of water, and drain because that combination gives soluble oxalates another way to leave the food.

Does soaking potatoes lower oxalates?

No. There is not enough consistent evidence for me to rely on soaking alone. The stronger practical evidence is for boiling and discarding the cooking water. For the approach I use, peel the potatoes, cut them into pieces, boil them in plenty of water, and drain them well.

What is an easier low oxalate alternative to potatoes?

White rice is my easiest low oxalate starch. It works with the same kinds of meals, and it is much simpler when you do not want to calculate preparation and portion around a potato.

Related recipe: Low Oxalate Instant Pot White Rice, the low oxalate starch I reach for on days I want zero fuss.

Read These Next

• How to Start a Low Oxalate Diet, a step-by-step beginner’s guide to making the first changes without trying to change everything at once.
• The Low Oxalate Foods List: What You Can Actually Eat, a practical reference for comparing foods, portions, and alternatives.
• Is White Rice Low in Oxalate?, the easy everyday starch to use when potatoes require more planning than you want to do.

Sources

1. Fontenot, L., et al. Oxalate in Foods: Extraction Conditions, Analytical Methods, Occurrence, and Health Implications. Foods, 2023. Read the peer-reviewed review.
2. Chai, W., and Liebman, M. Effect of different cooking methods on vegetable oxalate content. Journal of Agricultural and Food Chemistry, 2005. Read the study on PubMed.
3. Mitchell, T., et al. Dietary Oxalate Intake and Kidney Outcomes. Nutrients, 2020. Read the peer-reviewed review.
4. Abong’, G. O., et al. Phytochemicals in Leaves and Roots of Selected Kenyan Orange Fleshed Sweet Potato (OFSP) Varieties. International Journal of Food Science, 2020. Read the cultivar study.
5. Abong’, G. O., et al. Processing methods affect phytochemical contents in products prepared from orange-fleshed sweetpotato leaves and roots. Food Science & Nutrition, 2021. Read the processing study.

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.