How to Find the Best Protein Powder for Body Recomposition​

📌 Overview and Key Takeaways

This is a Certified Nutrition Coach’s guide on how to find the best protein powder for body recomposition​.

Discover how protein powder can help you lose fat and gain muscle.

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 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.

Protein Powder for Body Recomposition​

Can Protein Powder Support Body Recomposition?

Yes, protein powder can meaningfully support body recomposition, though it is a tool, not a silver bullet.

Body recomposition is the process of simultaneously losing fat and gaining muscle.

It depends heavily on adequate protein intake to:

• Preserve and build muscle while in a calorie deficit
• Support muscle building after resistance training (lifting weights)
• Keep you full for longer, thereby curbing cravings and overeating

Digesting protein also increases thermogenesis, or your metabolic rate and energy expenditure.

That said, the thermogenic benefits of protein are modest – nowhere near enough to offset the additional calories.

So if you simply add protein powder to your diet without making other dietary or lifestyle changes, you might create a calorie surplus, which could lead to weight gain.

If adding protein powder helps you meet your total daily protein needs without creating a calorie surplus, however, it can support body recomposition.

Exactly how much protein you need will depend on several individual factors, but research suggests that 1.4 grams per kilogram of bodyweight per day is good place to start (J Int Soc Sports Nutr, 2017).

If you cannot easily consume this much protein, then protein powder can help you easily fill in the gap.

It can be mixed with just milk or water, or incorporated into smoothies, oatmeal, and other recipes in seconds.

This convenience is hard to beat, especially for someone with a busy lifestyle.

That said, not all protein powders are created equal.

What is the Best Protein Powder for Calorie Deficit?

One could argue that because certain protein sources are slower-digesting than others, they are more filling.

One could also argue that because certain protein sources have more essential amino acids, particularly leucine, they are better for muscle-building.

But satiety over a full day tends to equalize, and a balanced diet should give you 100% of your essential amino acids, so the type of protein powder you choose does not really matter.

In other words, unless you have unique dietary needs, meeting your total daily protein intake is far more important than the protein source.

Ingredients do matter, however, especially when it comes to digestive health.

🚫 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 diarrhea.

Regularly consuming certain food additives might also alter the composition and function of your gut microbiome (North Clin Istanb, 2019).

These shifts in the population of microorganisms living in your digestive tract, known as gut dysbiosis, have been shown to impair weight loss (J Clin Med, 2025).

In fact, gut dysbiosis is increasingly recognized as a contributor to obesity (J Bacteriol, 2025).

So if body recomposition is your goal, avoiding ingredients that might disrupt your gut health should be a top priority.

⚠️ 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

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 might 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 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 might 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 might be more gut-friendly.

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. 2017.
2. Northern Clinics of Istanbul (NCI). Food additives and microbiota. 2019.
3. Journal of Gastroenterology and Hepatology Open (JGH Open). Gut microbiota dysbiosis in functional gastrointestinal disorders: Underpinning the symptoms and pathophysiology. 2021.
4. Journal of Clinical Medicine (J Clin Med). The Role of Gut Microbiota in the Development and Treatment of Obesity and Overweight: A Literature Review. 2025.
5. Journal of Bacteriology (J Bacteriol). Unraveling the gut microbiota’s role in obesity: key metabolites, microbial species, and therapeutic insights. 2025.
6. Advances in Nutrition | Journal (Adv Nutr). Systematic Review of the Gastrointestinal Effects of A1 Compared with A2 β-Casein. 2017.
7. 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.
8. Nutrients. Effect of a Protein Supplement on the Gut Microbiota of Endurance Athletes: A Randomized, Controlled, Double-Blind Pilot Study. 2018.
9. 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.