How to Find the Best Low Fiber Protein Powder

📌 Overview and Key Takeaways

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

Discover how to increase your protein intake on a low fiber diet.

Last Updated
Jan 9, 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 Fiber Protein Powder

Why Should I Add Low Fiber Protein Powder to My Diet?

Dietary fiber, also known as roughage, is the indigestible part of plants.

Unlike other nutrients, it is not broken down and absorbed by the body. Instead, it passes through the digestive tract relatively intact.

Most Americans do not eat nearly enough fiber, which is problematic because fiber intake supports digestive health, helps with weight management, and even lowers the risk for several chronic diseases (Nutr Rev, 2009).

That said, some individuals, especially those with digestive conditions like inflammatory bowel disease (IBD) or irritable bowel syndrome (IBS), may need to limit their fiber intake.

A low-fiber diet helps reduce bowel movement frequency, providing relief during IBD and IBS flare-ups.

A low fiber diet may also be prescribed before or after bowel surgery and before a colonoscopy to minimize stool bulk and ensure the bowel is completely empty.

To lower your fiber intake, simply avoid high fiber foods like whole grains, raw fruits and vegetables, and legumes.

How Much Fiber Is In My Protein Powder?

The U.S. Food and Drug Administration (FDA) provides guidelines on dietary fiber labeling, but only defines terms like “high” or “good source” of fiber. It does not define “low fiber” for labeling purposes.

In clinical settings, however, a low-fiber diet typically means less than 10 grams of fiber per day.

It is therefore safe to say that protein powders with fewer than 2 grams of fiber per serving can be considered low fiber protein powders.

Most protein powders do not contain much fiber because they are made from protein concentrates and/or isolates, which have been stripped of fiber and other non-protein components.

There are a few companies that make high fiber protein powders intended to help with weight loss, however, so be sure to check the Nutrition or Supplement Facts panel.

Also, keep in mind that what you mix your protein powder with can increase the fiber content. If you add fruits and veggies to your protein shake, for example, you will be adding lots of fiber!

What Is the Best Low Fiber Protein Powder​?

As you just learned, all plants contain fiber. So, if you want to limit your fiber intake, limit your intake of plant-based foods.

When it comes to protein powder, this means sticking to animal-based options like beef, collagen, egg white, and whey.

It also means avoiding plant-based food additives, especially gums.

Many protein powders contain added gums like guar gum and xanthan gum, all of which are extremely high in fiber.

Regularly eating additives like these will not only increase your fiber intake, but might also upset your stomach and alter the composition of your gut microbiome – the collection of microorganisms living in your gut (North Clin Istanb, 2019).

Many protein powders contain added gums like guar gum and xanthan gum, all of which are extremely high in fiber.

This can lead to gut dysbiosis, or an imbalance in gut bacteria, which is linked to the development of chronic stomach issues like irritable bowel syndrome (IBS) (Microorganisms, 2022; JGH Open, 2021).

The 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 digestive and overall 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 Protein Concentrates and Isolates

Although they are typically low in fiber, you might also want to avoid ultra-processed protein concentrates and isolates if you have a sensitive stomach.

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 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).

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. Nutrition reviews (Nutr Rev). Health benefits of dietary fiber. 2009.
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. 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.
5. Nutrients (Nutrients). Effect of a Protein Supplement on the Gut Microbiota of Endurance Athletes: A Randomized, Controlled, Double-Blind Pilot Study. 2018.
6. 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.