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Why Does My Pre-Workout Clump? Is It Safe, and What Can You Do About It?

Why Does My Pre-Workout Clump? Is It Safe, and What Can You Do About It?


If you’ve ever opened a fresh tub of your favourite pre-workout or pre-workout shot, only to find it’s looking more like a protein boulder than a fine powder, you’re definitely not alone. "Why is my pre-workout clumping?" is hands down one of the top questions I get asked—and the good news is, it’s nothing to stress about!

Why Does Pre-Workout Clump in the Tub?

First, let’s bust the myth: Clumping isn’t a sign your pre-workout powder has “gone off” or is unsafe to use. Instead, it comes down to the science of ingredients.


Many of the most effective compounds in pre-workout supplements are hygroscopic—meaning they naturally attract water from the air. The usual suspects include:

  • L-Carnitine

  • Beta-Alanine

  • Citrulline Malate

  • Creatine Monohydrate

  • AAKG (Arginine Alpha-Ketoglutarate)


When these are exposed to air—even inside a well-sealed tub—they’ll start to soak up moisture. Over time, this pulls the powder together, forming those stubborn lumps. In fact, if your stim-free pre-workout is clumping, it’s probably for the same reason!

Is Clumpy Pre-Workout Safe to Use?

Short answer: Absolutely.
Clumping is purely cosmetic and doesn’t affect the quality, safety, or effectiveness of your pre-workout or energy drinks. If anything, it’s proof your tub is packed with real, potent ingredients—not just artificial anti-caking agents.

That said, the only real downside is measuring out the right dose can get trickier with a scoop full of chunks.

Why Do Some Pre-Workouts Not Clump?

If you’ve had pre-workouts in the past that never clumped, chances are they included more artificial anti-caking agents—ingredients designed to keep the powder loose but not always what you want in a premium supplement.

At MySupplementShop, you’ll find brands focused on quality and transparency, so sometimes, a bit of clumping just means you’re getting the good stuff.

How Can You Fix or Prevent Pre-Workout Clumping?

Got a tub that’s more boulder than powder? Here are my top tips for keeping your pre-workout scoopable and fresh:

  1. Seal it Tight: Always close the lid properly after each use.

  2. Silica Packets Are Your Friend: Keep those little packets buried in the powder to help absorb extra moisture.

  3. Stir or Shake: Give your tub a shake now and again to break up any settled clumps.

  4. Store Cool & Dry: Store your pre-workout in the fridge (especially in summer!) and always keep the lid shut tight.

  5. Break It Up: Use a knife, fork, or even a blender to break down larger lumps—just return the powder to the tub when you’re done.

For best quality, aim to use your opened pre-workout within 6 weeks.

Should I Worry About Hardened or Clumpy Pre-Workout?

No need to panic! Hardened or clumpy pre-workout is normal and happens to almost any brand on the market—even the highest quality options in our pre-workout collection.

If you ever have questions about your tub or want advice on which pre-workout, stim-free pre-workout, or energy drink is best for you, feel free to drop me a message.


Explore More:


Got a question or a clumpy tub?

Shout if you need more help—after all, it’s all part of the pre-workout experience!

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