How to Find the Best Protein Powder for Mounjaro

📌 Overview and Key Takeaways

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

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

Last Updated
Feb 16, 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 Mounjaro

Are Protein Shakes Good for Individuals on Tirzepatide?

Mounjaro is a prescription medication used to treat type 2 diabetes.

Its active ingredient, tirzepatide, is a once-weekly injection that mimics two natural hormones. – GLP-1 and GIP – to regulate blood sugar and reduce appetite.

While approved primarily for blood sugar control, it can also lead to significant weight loss and is increasingly used off-label for obesity management.

A higher-dose version of tirzepatide, called Zepbound, is FDA-approved specifically for weight loss.

It is important to note that Mounjaro is most effective when paired with lifestyle and dietary changes.

One such change is increasing the percentage of your calories that come from protein.

Research shows that a high protein diet has advantages for both diabetes and weight loss because it improves blood sugar management, insulin sensitivity, and satiety (J Clin Med, 2019; Nutrients, 2021).

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

If your protein intake is too low, your body will start to break down muscle instead fat for energy, which is why studies have shown that GLP-1 RA treatment can result in significant reductions in muscle mass (Am J Clin Nutr, 2025).

Keep in mind that you should try to get as much protein as you can from foods like eggs, fish, and meat.

If dietary or lifestyle restrictions make consuming enough protein challenging, however, then adding a protein powder to your diet might be a good idea.

Protein powder can be mixed with just milk or water to make a protein shake.

It can also be added to oatmeal, yogurt, and other recipes, making it a convenient, versatile protein source.

How Much Protein Should I Eat On Mounjaro?

There is no specific protein intake requirement for patients taking Mounjaro.

But ensuring adequate protein intake, typically around 1.2 to 1.6 grams per kilogram of body weight per day, is recommended to help preserve muscle mass (Obesity (Silver Spring), 2025).

Note that for many individuals, 1.2-1.6 g/kg/day can easily amount to well over 100 grams of protein.

And as you can see below, even if you eat protein with every meal, you might not meet your protein needs.

• Breakfast: 2 eggs – 12 gram protein
• Lunch: 4 ounces chicken breast – 32 grams protein
• Snack: ¼ cup almonds – 7 grams protein
• Dinner: 4 ounces salmon – 23 grams protein
• Total: 74 grams 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.

What Is the Best Protein Powder for Mounjaro​?

Not all protein powders are created equal.

Unfortunately, many contain ingredients known to cause painful digestive issues and gut health problems that can make weight loss harder.

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

🚫 Avoid Food Additives

Emulsifiers, thickeners, and other ultra-processed additives can upset your stomach.

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

Regularly consuming additives can also alter the composition and function of your gut microbiome, which diminishes the efficacy of diabetic medications and impairs weight loss through several mechanisms (North Clin Istanb, 2020; World J Methodol, 2022; Gut Microbes, 2018).

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

Gut dysbiosis has been linked to higher concentrations of these hormones, which can inhibit hormone signaling and alter energy metabolism (N Engl J Med, 2025).

⚠️ 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.

Editorial Guidelines

---

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.

Sources

1. Journal of Clinical Medicine (J Clin Med). Effect of High-Protein Diet on Glycemic Control in People with Type 2 Diabetes. 2019.
2. 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.
3. The American Journal of Clinical Nutrition (Am J Clin Nutr). Muscle mass loss with GLP-1 receptor agonist therapy: mechanisms, mitigation strategies, and future perspectives. 2025.
4. 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.
5. Northern Clinics of Istanbul (North Clin Istanb). Food additives and microbiota. 2020.
6. World Journal of Methodology (World J Methodol). Gut microbiota interactions with anti-diabetic medications and pathogenesis of type 2 diabetes mellitus. 2022.
7. Gut Microbes (Gut Microbes). The human gut microbiota: Metabolism and perspective in obesity. 2018.
8. The New England Journal of Medicine (N Engl J Med). Gut Microbiome and Obesity. 2025.
9. Nutrients (Nutrients). Effect of a Protein Supplement on the Gut Microbiota of Endurance Athletes: A Randomized, Controlled, Double-Blind Pilot Study. 2018.
10. 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.