How to Find the Best CrossFit Protein Powder

📌 Overview and Key Takeaways

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

Discover how to supplement your protein intake as a CrossFit Athlete.

Last Updated
Feb 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.

CrossFit Protein Powder

Is Protein Powder Good for CrossFit Athletes?

Protein is just as important for CrossFit athletes as it is for strict weightlifters because it helps with exercise recovery, injury prevention, and immune system health.

Moreover, many CrossFit athletes do not consume nearly enough protein, which can have a serious negative impact on performance.

If you do not get enough protein when training hard, your body will break down muscle for use as fuel, will eventually make you weaker.

As a CrossFitter, building and maintaining muscle mass is beneficial for several reasons, including:

• Efficiency: Stronger muscles lead to more efficient technique.
• Power: Increased muscle mass can contribute to greater power output, enabling you to move faster and for longer.
• Injury prevention: Strong muscles provide better support and stability, decreasing the risk of injury.

It is recommended that CrossFit athletes consume at least 1.2 grams of protein per kilogram of body weight per day (J Int Soc Sports Nutr, 2012).

Eating this much protein can be challenging for some athletes, especially those with busy schedules or dietary restrictions, which is where protein powder can help.

Adding a scoop of protein powder to your diet is a convenient way to reach your protein goals and fill in gaps in your fueling regimen.

It can easily be added to smoothies, oatmeal, and other recipes, or simply mixed with milk or water to make a protein shake.

It is worth mentioning that some CrossFitters follow a Paleo diet, which can rule out many protein supplements.

In fact, 99% of protein powders are NOT Paleo.

For starters, most protein powders are made with either whey, soy, or pea protein, none of which are Paleo.

Most protein powders also contain ultra-processed additives like emulsifiers, thickeners, and flavors, none of which are Paleo either.

Finally, save for a handful exceptions, most protein powders are not Paleo because they are made from protein concentrates or isolates.

Protein sources like these are ultra-processed derivatives of whole foods that were absolutely not on the menu during the Paleolithic era.

So, if you are a CrossFit athlete on the Paleo diet, look for a protein powder made from a short list of simple ingredients, including whole food protein sources.

What Is the Best CrossFit Protein Powder?

The type of protein powder that you add to your diet is not important.

That is, as long as you are eating a balanced diet, any type (egg white, pea, whey, etc.) of protein powder can help achieve your fitness goals.

Not all protein powders are created equal, however.

Many protein powders contain ingredients that can not only cause painful side-effects, but also long-term health problems.

Among these ingredients are food additives and protein concentrates/isolates.

🚫 Avoid Food Additives

Regularly eating food additives like emulsifiers, thickeners, and flavorings can not only upset your stomach, but also alter the composition and function of your gut microbiome (North Clin Istanb, 2019).

This can lead to gut dysbiosis (Microorganisms, 2022), which can impair your athletic performance.

Your gut microbiome regulates energy metabolism (J Sport Health Sci, 2016) by supplying muscles with oxygen and nutrients during intense exercise.

It also reduces inflammation (Gut, 2018) and expedites tissue repair, helping to improve performance and expedite recovery.

So, when the balance of bacteria therein is off, your ability to train, perform, and recover is compromised.

⚠️ 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 Dairy-Based Proteins

Dairy-based proteins like whey and casein, although not an issue for everyone, can cause digestive issues.

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.

This is particularly true for casein protein, which forms a gel-like substance in your stomach that slows down digestion.

🚫 Avoid Protein Concentrates and Isolates

You might also want to avoid ultra-processed 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 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).

You 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. Journal of the International Society of Sports Nutrition (J Int Soc Sports Nutr). International Society of Sports Nutrition position stand: protein and exercise. 2012.
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. Journal of Sport and Health Science (J Sport Health Sci). Endurance exercise and gut microbiota: A review. 2016.
5. Gut (Gut). The microbiome of professional athletes differs from that of more sedentary subjects in composition and particularly at the functional metabolic level.. 2018.
6. Nutrients (Nutrients). Effect of a Protein Supplement on the Gut Microbiota of Endurance Athletes: A Randomized, Controlled, Double-Blind Pilot Study. 2018.
7. 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 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.