How to Find the Best Protein Powder for Autism

📌 Overview and Key Takeaways

This is a Dietitian’s guide on how to find the best protein powder for autism.

Discover how safely supplement your protein intake with autism.

Last Updated
Jan 19, 2026

Author and Medical Reviewer

Written by Jack, Founder

Jack is the Founder of Drink Wholesome.

Medically reviewed by Brittany, MS, RD and Jenn, PA-C

Kayla is a Registered Dietitian with a MS in Nutrition.

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

Protein Powder for Autism

Is Protein Powder Good for Autism?

Autism, also known as Autism Spectrum Disorder (ASD), is a neurological and developmental disorder that affects communication, social interaction, and behavior.

It is called a “spectrum” disorder because it affects individuals in varying degrees and the symptoms can range from mild to severe.

Children and even adults with ASD have food aversions and selective eating habits that lead to nutritional deficiencies, including inadequate protein intake.

Some also have behavioral issues that make mealtime challenging.

In fact, children with autism are five times more likely to experience mealtime challenges like tantrums (J Autism Dev Disord, 2013), extreme food selectivity, and ritualistic eating behaviors than children unaffected by the disorder.

In some cases, adding a protein powder to an autistic person’s diet can help fill in nutritional gaps and ensure he or she is meeting his or her daily protein needs.

Protein powder is so useful because it can easily be added to a variety of recipes, from smoothies, to baked goods, to soups and sauces.

That said, not all protein powders are created equal.

What Is the Best Protein Powder for Autism?

Many protein powders are also made from ingredients that might cause painful side effects and even long-term health problems for people with autism.

Among these ingredients are food additives, dairy-based proteins, and protein concentrates and isolates.

🚫 Avoid Food Additives

Regularly eating food additives like emulsifiers, thickeners, and flavorings can not only upset your stomach, but also alter the composition and function of your gut microbiome (North Clin Istanb, 2019).

This can lead to gut dysbiosis, or an imbalance in your gut microbiota (Microorganisms, 2022), which has been linked to increased risk for disorders such as autism spectrum disorder (Neuropharmacology, 2023).

Gut dysbiosis might also contribute to the severity of core and gastrointestinal symptoms in some individuals with ASD (Int J Mol Sci, 2023).

⚠️ 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

Note that this list includes several artificial sweeteners.

Artificial sweeteners like sucralose and acesulfame potassium are among the worst ingredients for your gut microbiome (Nature, 2014).

They both reduce microbial diversity and promote the growth of potentially pathogenic bacteria.

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

🚫 Avoid Dairy-Based Proteins

Dairy-based proteins like whey and casein, although not an issue for everyone, can cause digestive issues.

This is usually because they contain lactose, a sugar many individuals with sensitive stomachs cannot fully digest.

But you might be sensitive to dairy-based proteins even if you are not lactose intolerant.

This is particularly true for casein protein, which forms a gel-like substance in your stomach that slows down digestion.

🚫 Avoid Protein Concentrates and Isolates

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 (Nutrients, 2018) and cause the formation of toxic byproducts in your gut (Mol Nutr Food Res, 2024).

You should thus 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. Journal of Autism and Developmental Disorders (J Autism Dev Disord). Feeding problems and nutrient intake in children with autism spectrum disorders: a meta-analysis and comprehensive review of the literature. 2013.
2. Northern Clinics of Istanbul (North Clin Istanb). Food additives and microbiota. 2019.
3. Microorganisms (Microorganisms). Gut Microbiota Dysbiosis: Triggers, Consequences, Diagnostic and Therapeutic Options. 2022.
4. Neuropharmacology (Neuropharmacology). The gut-brain connection: Exploring the influence of the gut microbiota on neuroplasticity and neurodevelopmental disorders.. 2023.
5. International Journal of Molecular Sciences (Int J Mol Sci). Microbiota in Autism Spectrum Disorder: A Systematic Review.. 2023.
6. Nature (Nature). Artificial sweeteners induce glucose intolerance by altering the gut microbiota.. 2014.
7. Nutrients (Nutrients). Effect of a Protein Supplement on the Gut Microbiota of Endurance Athletes: A Randomized, Controlled, Double-Blind Pilot Study. 2018.
8. 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.