How to Find the Best SIBO Meal Replacement Shake

📌 Overview and Key Takeaways

This is a Certified Nutrition Coach’s guide on how to find the best SIBO meal replacement shake.

Discover how to safely meet your nutritional needs while managing SIBO.

Last Updated
May 22, 2026

Author and Medical Reviewer

Written by Jack, CNC

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

Disclaimer: This article is for general informational purposes only and is not a substitute for personalized medical advice. Consult a licensed healthcare professional before making changes to your diet.

Meal Replacement Shakes for SIBO

Are Meal Replacements Good for SIBO?

Some people with SIBO (Small Intestinal Bacterial Overgrowth) find meal replacements to be helpful, particularly during periods of poor appetite or restricted eating.

SIBO occurs when there is an overgrowth of bacteria in the small intestine, particularly of types of bacteria that normally grow in other parts of the gut.

This overgrowth can cause digestive issues like stomach pain and diarrhea. 

It can also cause significant malabsorption, as well as behavioral dietary restriction (selective eating), which can lead to nutritional deficiencies (Gastroenterology, 2020) (Alim Pharmacol Ther, 2013).

The most common treatment for SIBO is antibiotics, which can help decrease the number of bacteria in the small intestine.

Antibiotics will not address the underlying issue that caused SIBO in the first place, however, which is why they are often paired with dietary changes.

One such example is the SIBO diet, which is a temporary elimination diet designed to help determine which foods cause and reduce symptoms.

If you are on the SIBO diet, which takes 2-6 weeks, it is not a great time to introduce a new meal replacement to your diet.

But afterwards, the right meal replacement can help you meet your nutritional needs.

Moreover, in some cases, a liquid meal may also be the only thing your stomach can handle.

That said, not all meal replacement shakes are created equal.

What Is the Best SIBO Meal Replacement Shake?

Many meal replacements contain ingredients known to cause painful side effects and even long-term gut health problems for someone with SIBO.

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

🚫 Avoid Food Additives

Regularly eating emulsifiers, thickeners, and other ultra-processed additives can not only upset your stomach, but might also alter the composition of your gut microbiome – the collection of microorganisms living in your gut (North Clin Istanb, 2019).

These shifts, known as gut dysbiosis, have been linked to the development of SIBO (Microorganisms, 2023).

In fact, small intestinal bacterial overgrowth can be understood as a type of gut dysbiosis.

SIBO involves an overgrowth of bacteria in the small intestine specifically, whereas gut dysbiosis refers to an imbalance in bacteria in the digestive tract, generally speaking.

⚠️ Here is a list of the most common food additives in meal replacements:

• 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 a problem for everyone, can cause digestive issues too.

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.

For starters, the digestion of some caseins releases a bioactive peptide that has been linked to digestive issues (Adv Nutr, 2017).

Casein also forms a gel-like substance in your stomach that slows down digestion (Crit Rev Food Sci Nutr, 2023).

For sensitive individuals, particularly true for those with cow’s milk protein allergy or intolerance, slower digestion can contribute to bloating, constipation, and other side effects.

🚫 Avoid Protein Concentrates and Isolates

If you have a sensitive stomach, you might also want to avoid 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 you break them down.

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

For example, one study shows that regularly consuming protein concentrates and isolates might disrupt your gut microbiome (Nutrients, 2018).

Another study shows that it could cause the formation of toxic byproducts in your gut (Mol Nutr Food Res, 2024).

Although further research is needed, individuals with sensitive stomachs can play it safe by choosing protein supplements made from minimally-processed protein sources like egg whites and almonds.

They are more gut-friendly.

Order Samples to see for yourself.

Sources

1. Gastroenterology (Gastroenterology). AGA Clinical Practice Update on Small Intestinal Bacterial Overgrowth: Expert Review. 2020.
2. Alimentary Pharmacology & Therapeutics (Alim Pharmacol Ther). Review article: small intestinal bacterial overgrowth – prevalence, clinical features, current and developing diagnostic tests, and treatment. 2013.
3. Northern Clinics of Istanbul (North Clin Istanb). Food additives and microbiota. 2019.
4. Microorganisms (Microorganisms). Association between Gut Dysbiosis and the Occurrence of SIBO, LIBO, SIFO and IMO. 2023.
5. Advances in Nutrition | Journal (Adv Nutr). Systematic Review of the Gastrointestinal Effects of A1 Compared with A2 β-Casein. 2017.
6. 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.
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.

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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.