How to Find the Best Protein Powder for Zepbound

📌 Overview and Key Takeaways

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

Discover how to safely supplement your protein intake while on tirzepatide.

Last Updated
Mar 1, 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.

Protein Powder for Zepbound

Is Protein Powder Good for Individuals on Zepbound?

Zepbound is a brand name for a prescription drug whose active ingredient is tirzepatide.

It is marketed for chronic weight management in adults.

Zepbound helps reduce appetite (you feel full sooner and for longer) and slows gastric emptying (food stays in your stomach longer), which together reduce calorie intake.

Note that Zepbound is meant to be an adjunct to a reduced-calorie diet and increased physical activity.

In other words, it is most effective when administered in combination with diet and exercise.

One dietary change that compliments Zepbound is increasing the percentage of your calories that come from protein.

A high protein diet has advantages for individuals trying to lose weight because it improves blood glucose management, insulin sensitivity, and satiety (Nutrients, 2021).

Eating enough protein is also important for maintaining muscle mass while on Zepbound.

If your protein intake is too low, your body will start to break down muscle for energy instead fat.

In fact, studies have shown that tirzepatide treatment can result in significant reductions in muscle mass (Diabetes Obes Metab, 2025).

So if you cannot meet 100% of your protein needs by eating high protein foods like eggs, fish, and meat, then adding a protein powder to your diet might be a good idea.

It can be mixed with just water to make a protein shake, or added to smoothies, oatmeal, and other recipes to fill in gaps in your diet.

What Is the Best Zepbound Protein Shake​?

Not all protein supplements are created equal.

In fact, many contain ingredients known to cause gut health problems that can make weight loss harder.

Among the most problematic ingredients are food additives and protein concentrates and isolates.

🚫 Avoid Food Additives

First of all, regularly eating emulsifiers, thickeners, artificial sweeteners, and other ultra-processed additives can upset your stomach.

This matters because Zepbound use is already associated with digestive side effects, including nausea, vomiting, and diarrhea, particularly during dose escalation.

Certain additives can also alter the composition and function of your gut microbiome (North Clin Istanb, 2020).

These shifts, known as gut dysbiosis, might not only diminish the efficacy of tirzepatide (Eur J Pharmacol, 2025), but also impair weight loss through several mechanisms (Gut Microbes, 2018).

For example, your gut microbiome modulates the release of hunger-controlling hormones such as ghrelin and insulin.

And gut dysbiosis can lead to higher concentrations of these hormones (N Engl J Med, 2024), which can inhibit hormone signaling and alter energy metabolism.

⚠️ 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 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.

How Much Protein Should I Eat On Zepbound?

There is no specific protein intake requirement for people on Zepbound.

But consuming 1.2 to 1.6 grams of protein per kilogram of body weight per day is recommended to preserve muscle mass during weight loss (Obesity (Silver Spring), 2025).

For many individuals, this can easily amount to well over 100 grams of protein, which is a lot of protein!

Remember that your ideal protein intake depends on your body weight, activity level, etc.

For personalized recommendations, consult a registered dietitian or other healthcare professional.

Sources

1. Nutrients (Nutrients). Are Dietary Proteins the Key to Successful Body Weight Management? A Systematic Review and Meta-Analysis of Studies Assessing Body Weight Outcomes after Interventions with Increased Dietary Protein. 2021.
2. Diabetes, Obesity & Metabolism (Diabetes Obes Metab). Body composition changes during weight reduction with tirzepatide in the SURMOUNT-1 study of adults with obesity or overweight. 2025.
3. Northern Clinics of Istanbul (North Clin Istanb). Food additives and microbiota. 2020.
4. European Journal of Pharmacology (Eur J Pharmacol). The role of gut microbiota in Tirzepatide-mediated alleviation of high-fat diet-induced obesity. 2025.
5. Gut Microbes (Gut Microbes). The human gut microbiota: Metabolism and perspective in obesity. 2018.
6. The New England Journal of Medicine (N Engl J Med). Obesity. 2024.
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.
9. Obesity (Silver Spring, Md.) (Obesity (Silver Spring)). Nutritional priorities to support GLP-1 therapy for obesity: A joint Advisory from the American College of Lifestyle Medicine, the American Society for Nutrition, the Obesity Medicine Association, and The Obesity Society. 2025.

Editorial Guidelines

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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.