How to Find the Best Gut Healthy Protein Powder

📌 Overview and Key Takeaways

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

Discover how to supplement your protein intake and support your gut health.

Last Updated
Jan 9, 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.

Gut Healthy Protein Powder​

What Is the Gut?

Before we can talk about gut health, it is important that you understand what the gut is.

The gut, to put it simply, is a pathway through your body that allows you to break down food and absorb nutrients.

It starts in your mouth and ends in your colon.

Gut health refers to the function and balance of everything in this system.

That said, when people talk about gut health these days, they are usually referring to the gut microbiome – the collection of microorganisms living in your small intestines.

Your gut microbiome not only helps you digest food, but also plays an important role in your overall health.

This is why imbalances in gut bacteria have been linked to so many chronic diseases (Nat Commun, 2018).

It follows that taking care of your gut, specifically your gut microbiome, should be a top priority.

What Are Digestive Enzymes, Probiotics, Prebiotics, and Postbiotics?

Your gut is made up of many different parts, including digestive enzymes, probiotics, and prebiotics.

You might have come across one or more of these buzzwords when shopping for gut healthy protein powder​​​, so it makes sense to define them.

Digestive Enzymes

Digestive enzymes are proteins that help you break down food into smaller, more absorbable components.

They are naturally produced by the body, primarily in the salivary glands, stomach, pancreas, and small intestine.

You might have noticed that some protein powder companies add digestive enzymes to their formulas.

For individuals with conditions like irritable bowel syndrome (IBS) or inflammatory bowel disease (IBD), digestive enzyme supplementation has shown benefits (Eur Rev Med Pharmacol Sci, 2017).

That said, for healthy individuals, supplementing with digestive enzymes has not been shown to improve gut health.

In other words, for most people, added digestive enzymes are a gimmick.

Probiotics

Probiotics are bacteria and yeasts that live in your gut, and the most common are Lactobacillus and Bifidobacteria.

You can get probiotics foods prepared by bacterial fermentation as well as supplements.

Foods high in probiotics include yogurt, kefir, sauerkraut, tempeh, and kimchi.

Although the evidence is promising, more research is needed on the health benefits of probiotics (Gut Microbes, 2017).

That is, the scientific community still disagrees about what the actual benefits are (Gut Microbes, 2017), as well as about which strains of bacteria are good, and which are bad.

Some researchers even warn about possible negative effects of probiotics, and call for caution and strict regulation (Microorganisms, 2019).

It is worth adding that a growing number of food and supplement companies spike their products with probiotics to make them “gut-friendly.”

Although this might seem like a good thing, given the uncertainty surrounding the role of probiotics, however, I recommend avoiding products like these until more conclusive research is available.

Prebiotics

Prebiotics are foods that feed your gut bacteria, helping to create a healthy gut microbiome.

They can be found in high fiber foods like fruits, vegetables, and whole grains.

Some food and supplement companies also spike their products with prebiotics, but instead of using whole food sources of prebiotic fiber, they use cheap, ultra-processed ingredients like guar gum and inulin.

This is not a healthy way to feed your gut bacteria.

Summary

In most cases, you should be able get all the digestive enzymes, probiotics, and prebiotics that you need from a balanced diet.

If you do decide to supplement, however, keep in mind that it is hard to predict the appropriate dose or type without significant, in-depth testing under the guidance of a trained healthcare practitioner.

And even then, it can still be challenging.

So, just because a protein powder contains probiotics or prebiotics does not make it gut healthy.

In fact, the exact opposite might be true, that is, the presence of these added ingredients might be a sign that a protein powder has been stripped of natural digestive aids.

What Is the Best Gut Healthy Protein Powder?

Not all protein powders are created equal.

Many are made from ingredients known to cause painful side digestive issues and even long term gut health problems.

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

🚫 Avoid Food Additives

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

This can lead to gut dysbiosis, or an imbalance in gut bacteria, which is linked to a number of chronic digestive issues (Microorganisms, 2022; JGH Open, 2021).

Remember, your gut microbiome affects various physiological processes, including immune function and inflammation.

So, when the balance of bacteria therein is disrupted, it can have a huge impact on your digestive health.

⚠️ 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 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

If you have a sensitive stomach, 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).

Individuals with pre-existing digestive issues 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. Nature Communications (Nat Commun). Extensive impact of non-antibiotic drugs on human gut bacteria. 2018.
2. European review for medical and pharmacological sciences (Eur Rev Med Pharmacol Sci). Beta-glucan, inositol and digestive enzymes improve quality of life of patients with inflammatory bowel disease and irritable bowel syndrome. 2017.
3. Gut Microbes (Gut Microbes). To be or not to be – are we able to make that decision for our microbiota? 2017.
4. Microorganisms (Microorganisms). The Dark Side of Probiotics 2019.
5. Northern Clinics of Istanbul (North Clin Istanb). Food additives and microbiota. 2019.
6. Microorganisms (Microorganisms). Gut Microbiota Dysbiosis: Triggers, Consequences, Diagnostic and Therapeutic Options. 2022.
7. JGH Open: An Open Access Journal of Gastroenterology and Hepatology (JGH Open). Gut microbiota dysbiosis in functional gastrointestinal disorders: Underpinning the symptoms and pathophysiology. 2021.
8. Nutrients (Nutrients). Effect of a Protein Supplement on the Gut Microbiota of Endurance Athletes: A Randomized, Controlled, Double-Blind Pilot Study. 2018.
9. 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

---

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.