How To Get Protein Powder To Dissolve

📌 Overview and Key Takeaways

This is a Dietitian’s guide on how to get protein powder to dissolve.

Here are 5 tips to help you make a delicious protein shake every time.

Last Updated
Jan 20, 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.

Why Is Protein Powder Hard to Dissolve?

Before I explain how to make your protein powder mix better, I have to point out that being hard to mix, although frustrating, might be a good thing.

Most protein powders are made with protein concentrates and/or isolates, which have been stripped of everything but the protein, including the fiber.

Because most dietary fiber is often insoluble, meaning it does not dissolve in water, less fiber makes protein powder easier to mix.

But dietary fiber normalizes bowel movements, supports a healthy gut, promotes weight loss, and even lowers the risk for chronic diseases (Nutr Rev, 2009).

Plus, only 7% of the adult population eats enough fiber (nutrition.org), meaning you should probably make a point of eating more of it.

It is worth adding that insoluble fiber comes from plants, which is why plant-based protein powders tend to be the hardest to mix.

Another reason why some protein powders are harder to mix than others has to do with particle size.

Large particles take longer to dissolve than small particles because they have a smaller specific surface area (surface area ÷ mass).

Think about how long it would take to dissolve a sugar cube versus how long it would take to dissolve and an equal amount of granular sugar.

A sugar cube would dissolve slower because the combined surface area of all of the sugar granules is greater than the surface area of the cube, and more surface area means more contact with water.

Generally speaking, less processing means larger particle size, so protein sources with the largest particle size are typically the least processed.

These include egg whites, nuts, and hemp, all of which are whole food protein sources, not protein concentrates and/or isolates.

Remember that the latter have been mechanically and/or chemically stripped of everything but the protein, including 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 they do whole foods, which can affect everything from satiety to gut health.

In fact, studies show that regularly eating protein concentrates and isolates can disrupt the gut microbiome and cause the formation of toxic byproducts in your gut (Nutrients, 2018; Mol Nutr Food Res, 2024).

So, if your protein powder is hard to mix, it is probably less processed and contains more fiber, which is a good thing.

How Do I Dissolve Protein Powder?

Here are 5 ways to make your protein powder mix better:

1. Use a blender. A blender is hands down the best way to make a protein shake, especially if you want to add ice or ingredients like fresh fruit or yogurt. Most blenders make quick work of clumps so you can make a creamy protein shake every time. If you do not have a blender, you can also use a hand-held Electric Mixer. Just be sure not to fill the glass all the way to the top, or else you will make a mess.
2. Use a shaker bottle. A Shaker Bottle – is a plastic bottle with a small metal whisk inside. The whisk helps to break up the clumps of protein powder as you shake. Shakers are considered by many to be an essential for making protein shakes on-the-go.
3. Use a water bottle or mason jar with a tight fitting lid. Add the protein powder, your liquid of choice, and a handful of ice cubes. The ice cubes will act like a whisk and help to break up the clumps of powder as you shake.
4. Mix the protein powder using a balloon whisk. Keep in mind that the warmer the liquid is, the easier it will be to dissolve the protein powder. You can always add ice cubes later if you prefer a cold protein shake.
5. If you only have a glass and spoon, add the protein powder slowly, stirring constantly. Wait until each spoonful is completely dissolved before adding another.

It is worth noting that milk contains fat and proteins, which can make mixing harder and cause clumping.

So, if you’re having a hard time mixing your protein powder with milk, try mixing it with water.

It is also important to note that some protein powders are easier to mix than others because they contain emulsifiers like sunflower lecithin.

Although ingredients like these improve solubility, they are also known to cause digestive issues, so I would avoid them if possible.

Sources

1. Nutrition Reviews (Nutr Rev). Health benefits of dietary fiber. 2009.
2. Nutrients (Nutrients). Effect of a Protein Supplement on the Gut Microbiota of Endurance Athletes: A Randomized, Controlled, Double-Blind Pilot Study. 2018.
3. 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.