How to Find the Best Low FODMAP Protein Powder

📌 Overview and Key Takeaways

This is a Certified Nutrition Coach’s guide on how to find the best low FODMAP protein powder.

Discover how to safely meet your protein needs on the low FODMAP diet.

Low FODMAP Protein Powder

Is Protein Powder Low FODMAP?

Protein powder can be low FODMAP or high FODMAP depending on the ingredients.

Some protein powders are certified low FODMAP, meaning they have been tested and approved by a third-party organization.

Our Unflavored Egg White Protein Powder and Unflavored Collagen Protein Powder, for example, were low FODMAP certified by Monash University, a leader in low FODMAP research.

Some of our other protein powders, such as our Vanilla Egg White Protein Powder and Vanilla Collagen Protein Powder, also meet the low FODMAP criteria.

They were not certified low FODMAP, however, because the ongoing cost of certification is prohibitively high.

In fact, this is the main reason why most brands do not pursue certification.

That a product is not certified low FODMAP thus does not necessarily mean that it is not suitable for the low FODMAP diet.

How Do I Know if a Protein Powder Is Low FODMAP?

First of all, it is impossible to determine the FODMAP content of a food without laboratory testing.

It is therefore a good idea to familiarize yourself with high FODMAP foods.

Moreover, when it comes to packaged foods, the exact quantity of each ingredient is not disclosed.

This means that if a high FODMAP ingredient is listed, the actual amount might be so small that you can tolerate it, but there is no way of knowing.

But unless a packaged food is certified low FODMAP by a reputable organization, you should add it to your diet with caution.

As a rule of thumb, if you do not recognize it and cannot figure out what it is, do not eat it.

What Is the Best Low FODMAP Protein Powder?

Common high FODMAP protein powder ingredients include whey and casein, inulin, natural flavors, and sugar alcohols like xylitol.

Just because a protein powder company does not use any of these high FODMAP ingredients, however, does not mean that its powders are good for your gut.

Many protein powders are made with ingredients that, FODMAPs aside, can cause painful side effects 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 ultra-processed additives can not only upset your stomach, but also alter the composition and function of your gut microbiome (North Clin Istanb, 2020).

These shifts, known as gut dysbiosis, have been linked to the development of IBS and other digestive diseases (J Clin Med, 2023).

It is so problematic because it causes a cascade of problems, including intestinal permeability, systemic inflammation, impaired nutrient absorption, and reduced short-chain fatty acid (SCFA) production.

⚠️ Here is a list of the most common food additives in protein shakes and powders:

• 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

Basically, if you could not find an ingredient in nature or make it at home, it should not be in your protein powder.

🚫 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 shakes and powders 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 shakes and powders made from minimally-processed protein sources like egg whites and almonds.

They are more gut-friendly.

Order Samples to see for yourself.

What are FODMAPs?

FODMAPs (fermentable oligosaccharides, disaccharides, monosaccharides and polyols) are short-chain carbohydrates (sugars) found in certain foods like fruits, grains, and sweeteners.

Some people, especially those with medically diagnosed irritable bowel syndrome (IBS), have trouble digesting FODMAPs and experience gastrointestinal (GI) side effects after consuming too many.

Side effects vary from mild to severe and include bloating, diarrhea, and stomach pain.

A low-FODMAP diet aims to mitigate GI symptoms by reducing the number of FODMAPs in the diet.

One of the challenges with the low FODMAP diet is that symptoms are not consistent or predictable, so it can be difficult to identify trigger foods.

This is why it is important to follow a structured low FODMAP elimination diet under the guidance of a trusted healthcare professional.

Why Are FODMAPs Hard to Digest?

FODMAPs are sugar molecules linked together in chains.

Molecules like these must be broken down before they can be absorbed by the small intestine.

The problem with FODMAPs is that they are not easily broken down, which gives your gut bacteria more time to ferment (eat) them.

As they eat, gut bacteria produce gas, causing bloating, flatulence, and stomach pain.

Keep in mind that these symptoms can affect anyone, even people without IBS.

But they can be more severe in IBS sufferers due to visceral hypersensitivity, or a lower threshold for pain (Lancet, 2020)

How Long Should I Be on the Low FODMAP Diet?

The low FODMAP diet is intended to be a tool to help temporarily relieve GI symptoms and help identify trigger foods.

While changing your diet can, to some extent, alter the composition of bacteria in your gut, the low FODMAP diet does not treat or address root causes of gut dysfunction.

In most cases, there is something more serious happening in the gut, like Small Intestinal Bacterial Overgrowth (SIBO), that needs to be addressed.

The low FODMAP diet is intended to be a tool to help temporarily relieve GI symptoms and help identify trigger foods.

Furthermore, many of the foods restricted on the low FODMAP diet – like garlic, onions, and broccoli – are rich in nutrients, fiber, and antioxidants.

They should therefore only be temporarily eliminated from your diet.

This is why it is so important to work with a registered dietitian to address the root cause of your GI issues and slowly reintegrate these health-promoting foods into your diet.

How Much Protein Should I Eat on the Low FODMAP Diet?

Eating enough protein is not particularly difficult on the low FODMAP diet.

Most animal-based proteins are low (or no) FODMAP, unless they are prepared with certain marinades, sauces, or seasonings that contain high FODMAP ingredients.

Plant-based sources of protein such as chickpeas, lentils, and tofu are also safe in limited quantities.

For individuals following a low FODMAP protocol, the recommended daily protein intake typically falls within the range of 0.8 to 1.2 grams of protein per kilogram of body weight.

The actual amount of protein you need will vary based on factors such as activity level, age, etc.

When following the low FODMAP diet, it is also recommended that you diversify your protein sources to minimize palate fatigue.

And if you are struggling to meet your protein goals while following a low FODMAP diet, filling in the gaps with a FODMAP-friendly protein powder can be a helpful option to consider.

Can I Use Low FODMAP Protein Powder During a Flare Up?

During an IBS or ulcerative colitis flare-up, the right low FODMAP protein powder can provide nutrition without irritating your gut.

It is essential to listen to your body, however, and only consume foods that do not exacerbate your symptoms.

How Should I Adopt the Low FODMAP diet?

Starting a low FODMAP diet can feel incredibly overwhelming.

Here are a few dietitian-approved tips for successfully navigating a low FODMAP diet:

• Start with the protein. Since many animal-based protein options naturally contain low to no FODMAPs, start by choosing an animal-based protein source and build your meal around it. This can help take some of the pressure off when meal planning or deciding what to eat. If you follow a plant based diet, I highly encourage you to reach out to a registered dietitian to get help identifying safe foods that meet your needs.
• Practice adequate meal spacing. Strategically spacing meals helps improve gastrointestinal motility, thus enabling the gut cleansing mechanisms facilitated by the migrating motor complex (MMC). The MMC is like the gut’s internal housekeeping system that activates approximately 2.5-3 hours after eating and clears out excess food particles and bacteria to prepare for the next meal. Eating too closely together or sipping on caloric beverages throughout the day can disable the MMC, delay motility, and lead to digestive issues.
• Avoid drinking water with your meals. Water consumption during meals can dilute stomach acid and enzymes, which makes it harder for the digestive system to efficiently break down foods and often leads to increased GI discomfort.
• Note symptoms so you can monitor them over time. Keep a journal of your symptoms to track changes over time, especially as you make dietary adjustments. While progress may seem gradual, every small victory plays an important role in improving gut health.

It is crucial to emphasize that the low FODMAP diet can feel inherently restrictive and st