How to Find Meal Replacement Shakes That Don’t Cause Gas

📌 Overview and Key Takeaways

This is a Certified Nutrition Coach’s guide on how to find meal replacement shakes that do not cause gas.

Discover what causes meal replacement gas and how to avoid this common side effect.

Last Updated
Jul 21, 2026

Author and Medical Reviewer

Written by Jack, CNC

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

Disclaimer: This communication 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 Replacements That Don’t Cause Gas

Why Do Meal Replacements Make Me Gassy?

If meal replacements make you gassy, you are not alone.

Bloating, farts, and stomach pain are common side effects of consuming meal replacements.

Some people assume that flatulence is the price to pay for adding a meal replacement to their diet, but this is simply not the case.

Your meal replacement should not make you gassy, and if it does, you need to find a new one!

Before you switch brands, however, you need to understand what is causing meal replacement gas in the first place.

Gas is produced by bacteria in your gut.

These microorganisms eat (ferment) the food that you cannot digest, releasing gas as a byproduct.

Excessive gas or painful bloating, it follows, might be a sign that your meal replacement shake is hard to digest.

And if you feel bloated or gassy every time you drink a meal replacement shake, it is time to take a close look at the ingredient list.

Keep in mind that having pre-existing gut issues can exacerbate digestive issues.

So, if you think that an undiagnosed medical condition might be contributing to excessive gas, consult a medical professional.

What Are the Best Meal Replacement Shakes That Don’t Cause Gas?

To avoid gas, avoid ingredients that are hard to digest.

🚫 Avoid Food Additives

Many people, particularly those with sensitive stomachs, report that emulsifiers, thickeners, and other ultra-processed food additives cause digestive issues like bloating and gas.

Regularly consuming certain food additives can also alter the composition and function of your gut microbiome – the collection of microorganisms living in your digestive tract (North Clin Istanb, 2019).

These shifts, known as gut dysbiosis, are associated with chronic bloating and flatulence (JGH Open, 2021).

⚠️ 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 an ingredient in nature or make it at home, it is a food additive.

🚫 Avoid Dairy-Based Proteins

Dairy-based proteins like whey and casein, although not a problem for everyone, can cause gas 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, gas, and other side effects.

🚫 Avoid Added Fiber

Some companies fortify their meal replacements with high fiber ingredients like guar gum.

One popular brand adds a whopping 20 grams of fiber per serving this way!

Not only is this way too much fiber for one sitting, but gums, as you just learned, are notorious for causing excessive gas.

If there is fiber in your meal replacement, it should come from whole foods.

🚫 Avoid Protein Concentrates and Isolates

If you have a sensitive stomach, you might also want to avoid protein concentrates and isolates.

Most meal replacements contain one or both of these ultra-processed protein sources, which have been mechanically and 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 meal replacements made from minimally-processed protein sources like egg whites and almonds.

They are more gut-friendly.

Order Samples to see for yourself.

Sources

1. Northern Clinics of Istanbul (North Clin Istanb). Food additives and microbiota. 2020.
2. JGH Open (JGH Open). Gut microbiota dysbiosis in functional gastrointestinal disorders: Underpinning the symptoms and pathophysiology. 2021.
3. Advances in Nutrition | Journal (Adv Nutr). Systematic Review of the Gastrointestinal Effects of A1 Compared with A2 β-Casein. 2017.
4. 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.
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

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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.