How to Find the Best Protein Powder for Ulcerative Colitis

📌 Overview and Key Takeaways

This is a Certified Nutrition Coach’s guide on how to find the best protein powder for ulcerative colitis.

Discover how to safely meet your protein needs while managing UC.

Last Updated
Mar 28, 2026

Author and Medical Reviewer

Written by Jack, CNC

Jack is a National Academy of Sports Medicine Certified Nutrition Coach.

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

Brittany is a Registered Dietitian with a MS in Nutrition.

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

Protein Powder for Ulcerative Colitis

What Is Ulcerative Colitis?

Inflammatory bowel disease (IBD) is an umbrella term for two conditions that cause chronic inflammation of the digestive tract.

These conditions are Crohn’s disease and ulcerative colitis.

Both cause symptoms like bloating, diarrhea, and stomach pain.

They can also lead to severe weight loss.

Ulcerative colitis (UC) develops when your immune system attacks the cells that line your large intestine (colon).

This causes inflammation and tiny open sores called ulcers.

Although ulcerative colitis is not caused by what you eat, doctors and dietitians agree that food plays an important role in managing symptoms.

Certain foods can aggravate symptoms, whereas others can reduce symptoms and even promote healing.

Paying attention to what you eat and how your body responds is essential for living with ulcerative colitis.

Is Protein Powder Good for Ulcerative Colitis?

Creating a diet for your specific condition is complicated.

Whether you have Crohn’s disease or ulcerative colitis, your triggers may be different from someone else’s.

There is thus no single ulcerative colitis diet that works for everyone.

Specialized ulcerative colitis diets are controversial because they are restrictive and do not work in every case.

The best diet for ulcerative colitis is one that meets your individual nutritional needs and helps you manage your symptoms.

Despite the personalized nature of eating with IBD, however, there are several universal guidelines.

Eating enough protein, for example, is important for everyone with IBD.

The inflammation from Crohn’s disease or ulcerative colitis can increase your protein needs by up to 25% (Lancet Gastroenterol Hepatol, 2023).

UC patients should eat 1.2-1.5 grams of protein per kilogram of body weight per day, which is much more than the 0.8 g/kg/day recommended for healthy adults (Eur J Nutr, 2021).

Chronic inflammation can impair your ability to absorb nutrients from food, leading to serious problems like weight loss and malnutrition.

Making protein a priority between flares is essential.

Adequate dietary protein intake will help prevent weight loss, muscle atrophy, and other complications.

Dietary protein might also help repair your intestinal mucosal barrier, or the protective lining of your intestines (Anim Sci J, 2020).

Just keep in mind that protein powder should not replace other forms of dietary protein.

That is, you should try to get most of your protein from foods like chicken, eggs, fish, legumes, nuts, and seeds.

Getting enough protein from food alone can be challenging for some people, however, which is where protein powder can help.

Adding a protein powder to your diet is an easy way to increase your protein intake and fill in nutritional gaps, especially when eating feels like a chore.

Having said that, not all protein powders are created equal.

What Is the Best Protein Powder for Ulcerative Colitis?

Many protein powders are made with ingredients that can cause painful side effects for someone with ulcerative colitis, and might even contribute to the development of the disease.

The main ingredients to avoid are food additives, dairy-based proteins, and protein concentrates and isolates.

🚫 Avoid Food Additives

Regularly eating emulsifiers, thickeners, and other ultra-processed additives can upset your stomach.

These additives can also alter the composition and function of your gut microbiome – the collection of microorganisms living in your digestive tract (North Clin Istanb, 2020).

These shifts, known as gut dysbiosis, have been linked to the development of ulcerative colitis (Int J Mol Sci, 2022).

A healthy gut microbiome helps produce mucins, which are proteins that form the protective mucus layers of the intestinal barrier (Exp Mol Med, 2021).

An unhealthy gut microbiome weakens this barrier, causing inflammatory damage.

A healthy gut microbiome also helps expand regulatory T cells, which reduce intestinal inflammation by helping repair the intestinal mucosal barrier (Nature, 2013).

A dysbiotic gut microbiome thus makes you more susceptible to inflammation and less able to fight it.

⚠️ 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

If you could not find an ingredient in nature or make it at home, it is probably a food additive.

🚫 Avoid Dairy-Based Proteins

Dairy-based proteins like whey and casein can also cause digestive issues.

This is primarily because they contain lactose, a sugar that many people cannot fully digest.

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

This is especially true for casein protein, which forms a gel-like substance in your stomach that slows down digestion (Crit Rev Food Sci Nutr, 2023).

🚫 Avoid Protein Concentrates and Isolates

If you have a sensitive stomach, avoid ultra-processed protein concentrates and isolates.

Most protein supplements are made from one or both of these ultra-processed protein sources.

They have been mechanically or chemically stripped of everything except the protein, including enzymes, fiber, and other natural digestive aids.

These non-protein components help your gut break down protein, so you do not digest concentrates and isolates in the same way that you digest whole foods.

This could affect your gut health.

For example, studies show that regularly eating protein concentrates and isolates might disrupt your gut microbiome (Nutrients, 2018).

They can also cause toxic byproducts to form in your gut (Mol Nutr Food Res, 2024).

People with pre-existing digestive issues should look for protein supplements made from whole food protein sources like egg whites and almonds.

They are more gut-friendly.

Order Samples to see for yourself.

Sources

1. The Lancet. Gastroenterology & Hepatology (Lancet Gastroenterol Hepatol). Inflammation and malnutrition in inflammatory bowel disease. 2023.
2. European Journal of Nutrition (Eur J Nutr). Habitual dietary intake of IBD patients differs from population controls: a case–control study. 2021.
3. Animal Science Journal = Nihon chikusan Gakkaiho (Anim Sci J). Regulation of the intestinal barrier by nutrients: The role of tight junctions. 2020.
4. Northern Clinics of Istanbul (North Clin Istanb). Food additives and microbiota. 2020.
5. International Journal of Molecular Sciences (Int J Mol Sci). Dysbiosis in Inflammatory Bowel Disease: Pathogenic Role and Potential Therapeutic Targets. 2022.
6. Experimental & Molecular Medicine (Exp Mol Med). Slimy partners: the mucus barrier and gut microbiome in ulcerative colitis. 2021.
7. Nature (Nature). Treg induction by a rationally selected mixture of Clostridia strains from the human microbiota. 2013.
8. Critical Reviews in Food Science and Nutrition (Crit Rev Food Sci Nutr). Milk proteins: Processing, gastric coagulation, amino acid availability and muscle protein synthesis. 2023.
9. Nutrients (Nutrients). Effect of a Protein Supplement on the Gut Microbiota of Endurance Athletes: A Randomized, Controlled, Double-Blind Pilot Study. 2018.
10. 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 Certified Nutrition Coach and reviewed by a Registered Dietitian. We rely on peer-reviewed research and trusted medical sources, and regularly update our content to ensure accuracy and clarity.