How to Find the Best Low Oxalate Protein Powder

📌 Overview and Key Takeaways

This is a Dietitian’s guide on how to find the best low oxalate protein powder​.

Discover how to safely supplement your protein intake on a low oxalate diet.

Last Updated
Feb 3, 2026

Author and Medical Reviewer

Written by Kayla Kamen, MS, RD

Kayla Kamen is a Registered Dietitian with a MS in Nutrition.

Medically reviewed by Jennifer Fossett, PA-C

Jennifer Fossett is a Physician Assistant with a BA in Nutritional Sciences.

Low Oxalate Protein Powder

Which Types of Protein Powder Are Low in Oxalates?

For individuals at risk of kidney stones or seeking to reduce their oxalate intake, choosing a low oxalate protein powder​ is important.

Here are the types of protein powders that are low in oxalates:

1. Egg white protein powder: Egg whites are low in oxalates. They are also low in purines, which can contribute to the formation of certain types of kidney stones, specifically uric acid stones.
2. Collagen protein powder: Collagen is low in oxalates and purines.
3. Whey protein powder: Whey is low in oxalates and purines. It also contains calcium, which can help bind to oxalates in the digestive system, preventing their absorption and reducing the risk of calcium oxalate stone formation. Many people have a hard time digesting whey protein, however, because it contains lactose.

As long as you are eating a balanced diet, the type of low oxalate protein powder you use does not really matter.

That is, any type can help you meet your dietary protein needs, so pick the one that you like or tolerate the best.

Most other types of protein powder contain moderate amounts of oxalates.

Soy and nut-based protein powders, however, tend to be high in oxalates, so they should be limited or avoided by those prone to developing kidney stones.

It is also important to note that added ingredients can contribute to oxalate levels in protein powder.

Cocoa and peanuts, for example, are high oxalate ingredients to look out for.

If you are managing oxalate intake due to kidney stone risk, you should thus avoid chocolate and peanut butter-flavored protein powders.

What Is the Best Low Oxalate Protein Powder?

Not all low oxalate protein powder​s are created equal, and just because a protein powder is low in oxalates does not mean that it is necessarily good for you.

Many low oxalate protein powder​s contain ingredients that can cause painful side effects and even substantially impact the risk and development of kidney stones.

Among these ingredients are food additives and protein concentrates and isolates.

🚫 Avoid Food Additives

Regularly eating emulsifiers, thickeners, and other additives can alter the composition and function of your gut microbiome (North Clin Istanb, 2019).

These shifts, known as gut dysbiosis, might contribute to the development of kidney stones (Sci Rep, 2024).

Emerging studies suggest that this occurs due to the modulation of urinary metabolites, changes in intestinal oxalate metabolism, and systemic inflammatory response.

⚠️ Here is a list of the most common food additives in protein supplements:

• acacia fiber
• acacia gum
• acesulfame potassium
• artificial flavors
• ascorbic acid
• aspartame
• calcium carbonate
• carrageenan
• cellulose gum
• dextrin
• dicalcium phosphate
• dipotassium phosphate
• erythritol
• gellan gum
• guar gum
• gum arabic
• inulin
• locust bean gum
• maltitol
• maltodextrin
• mono- and diglycerides
• ‘natural’ flavors
• rice bran extract
• rice dextrin
• rice hulls
• rosemary extract
• silica
• silicon dioxide
• sodium alginate
• soluble corn fiber
• sorbitol
• soy lecithin
• sucralose
• sunflower lecithin
• tocopherols
• tricalcium phosphate
• xanthan gum
• xylitol
• zinc oxide

As a rule of thumb, if you cannot find it in nature or make it at home, it is probably a food additive.

🚫 Avoid Protein Concentrates and Isolates

If you are prone to getting kidney stones, you might also want to avoid ultra-processed protein concentrates and isolates.

Most protein supplements are made from one or both of these ultra-processed protein sources, which have been mechanically and/or chemically stripped of everything but the protein.

This includes the enzymes, fiber, and other natural digestive aids that help your gut break them down.

You therefore do not digest them in the same way that you do whole foods, which could affect your gut health.

Studies show that regularly eating protein concentrates and isolates might disrupt your gut microbiome and cause the formation of toxic byproducts in your gut (Nutrients, 2018; Mol Nutr Food Res, 2024).

It is therefore recommended that you look for protein supplements made from whole food protein sources like egg whites and almonds, which are easier to digest and absorb.

Order Samples to see for yourself.

Sources

1. Northern Clinics of Istanbul (North Clin Istanb). Food additives and microbiota. 2019.
2. Scientific Reports (Sci Rep). A possible connection between gut microbiota and the occurrence of kidney stones. 2024.
3. Nutrients (Nutrients). Effect of a Protein Supplement on the Gut Microbiota of Endurance Athletes: A Randomized, Controlled, Double-Blind Pilot Study. 2018.
4. Molecular Nutrition & Food Research (Mol Nutr Food Res). In Vitro Fermentation of Animal and Plant Protein Isolates by the Human Gut Microbiota Under High and Low Carbohydrate Conditions.. 2024.

Editorial Guidelines

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This article was written by a Registered Dietitian and reviewed by a Physician Assistant. We rely on peer-reviewed research and trusted medical sources, and regularly update our content to ensure accuracy and clarity.