Can Kids Have Protein Powder?

📌 Overview and Key Takeaways

Can kids have protein powder? This is a Dietitian’s guide on how to determine if a protein powder is safe for kids.

Last Updated
Jan 28, 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 Kids

How Much Protein Do Kids Need?

Protein plays a vital role in growth and development, acting as a fundamental building block for muscles, skin, and bones.

It also serves as a crucial component of antibodies, which protect the body from illnesses.

Suffice it to say, eating enough protein is super important during childhood, particularly during growth spurts.

The Dietary Reference Intake for protein for kids ages 4 to 13 is 0.95 grams per kilogram of body weight per day (Nutrients, 2021).

Most kids therefore need to eat between 25 and 50 grams of protein per day.

Active kids or kid athletes may need considerably more, however.

Some guidelines recommend up to 2 grams per kilogram of body weight per day to meet the increased needs for growth, repair, and adaptation to exercise (Med Sci Sports Exerc, 2016).

Keep in mind that most kids should be able to get enough protein from foods like dairy, eggs, fish, legumes, meat, nuts, and seeds.

Some kids, like picky eaters or those with dietary restrictions, might have a hard time doing so, however.

This is where protein supplements can help.

Is Protein Powder Safe for Kids?

Adding protein powder to smoothies, oatmeal, and other recipes is an easy and perfectly healthy way to fill in gaps in a kids diet.

That said, not all protein powders are safe for kids.

Many protein powders contain ingredients known to cause painful side effects and even long-term health problems for kids.

Among the most problematic ingredients are food additives, dairy-based proteins, and protein concentrates and isolates.

🚫 Avoid Food Additives

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

Over time, this can lead to gut dysbiosis, which contributes to a wide range of chronic diseases, including allergies, type 1 diabetes, and obesity (J Exp Med, 2019).

Your gut microbiome affects various physiological processes, including immune function and inflammation.

So when the balance of bacteria therein is disrupted, it can have a huge impact on your overall health.

⚠️ 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 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.

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 (Nutrients, 2018) and cause the formation of toxic byproducts in your gut (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. Nutrients (Nutrients). Dietary Protein Requirements in Children: Methods for Consideration. 2021.
2. Medicine & Science in Sports & Exercise (Med Sci Sports Exerc). Nutrition and Athletic Performance. 2016.
3. Northern Clinics of Istanbul (North Clin Istanb). Food additives and microbiota. 2019.
4. The Journal of Experimental Medicine (J Exp Med). The gut microbiome: Relationships with disease and opportunities for therapy. 2019.
5. Nutrients (Nutrients). Effect of a Protein Supplement on the Gut Microbiota of Endurance Athletes: A Randomized, Controlled, Double-Blind Pilot Study. 2018.
6. 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 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.