3 Signs Your Protein Powder Isn't Clean

True Protein Blog Avatar Fallback reviewed by our Nutrition Team 29 August 2025

Choose your next protein with total confidence by learning the three simple signs that separate a genuinely clean product from one full of additives.

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3 Signs Your Protein Powder Isn't Clean

Choosing a protein powder shouldn't be complicated. You want something that helps you recover, build muscle, and feel your best. But many products are packed with ingredients you don't need. 

So, how can you tell if your protein is genuinely clean? It’s easier than you think. Forget the hype and just look for these three simple signs. 

 

Key Takeaways 

  • Check the Label: A clean protein has a short, simple ingredient list. A long list full of numbers and chemical names is a major red flag. 

  • Trust Your Gut: If your protein shake tastes artificial, leaves a chemical aftertaste, or makes you feel bloated, it's a sign of low-quality ingredients. 

  • Demand Honesty: Clean brands are proud of their ingredients and will tell you where they come from. If a brand is secretive, ask yourself why. 

 

Sign 1: The Ingredient List is Long & Full of Numbers 

This is the fastest and easiest way to check your protein. Flip it over and look at the ingredients. A clean protein doesn't have anything to hide. 

What to look out for: 

  • A long list of ingredients you can’t pronounce. 

  • Artificial Sweeteners like Sucralose (955), Aspartame (951), or Acesulfame Potassium (950). These numbers are the biggest giveaway. 

  • Fillers which are often added to create a thicker texture but can cause stomach upset. 

The True Protein Way: Across our entire range, we use a "less is more" approach. Whether it's a lean whey isolate, a nourishing plant-based blend, or a collagen formula, you'll only find what's necessary. We refuse to use artificial sweeteners, colours, or unnecessary fillers in any of our products.

 

Sign 2: It Tastes Artificial or Makes You Feel Bloated 

How you feel after your shake is a crucial test. Your body knows the difference between high-quality nutrition and a mix of synthetic chemicals. 

What to look out for: 

  • A Chemical Aftertaste: That weird, lingering sweetness is the signature of artificial sweeteners. A clean protein should taste natural and refreshing. 

  • Bloating and Discomfort: If you feel gassy or bloated after your shake, it could be a reaction to low-quality protein with high lactose content or the unnecessary gums and additives. 

The True Protein Way: We prioritise quality ingredients that are effective and gentle on your body. From our smooth, low-lactose WPI to our best-selling Plant Protein, we choose premium sources that are known for better digestion and a cleaner taste. By flavouring our products with natural ingredients, we ensure a clean taste without the nasty aftertaste. 

 

Sign 3: The Brand is Secretive About Its Sourcing 

You deserve to know what you're putting in your body. Trustworthy brands are open and honest about where their ingredients come from. 

What to look out for: 

  • Vague "Made in Australia" claims that don't tell you where the raw ingredients were sourced. 

  • No mention of third-party testing to guarantee purity and safety. 

  • A lack of information about the quality of the core ingredients (e.g., is the whey from grass-fed cows?). 

The True Protein Way: Transparency is simple for us. We proudly source our whey from grass-fed cows in New Zealand, known for the highest standards in the world. We make sure every batch is pure, safe, and exactly what we promise.

 

How to Choose a Genuinely Clean Protein 

Next time you shop, just remember this simple checklist. 

✅ Simple Ingredients: Look for a list you can actually understand. 

✅ No Artificial Sweeteners: Avoid the numbers (955, 951, 950). 

✅ Tastes Clean & Natural: It shouldn't have a chemical or overly sweet aftertaste.

✅ Transparent Brand: Choose a brand that's proud to tell you what's inside their products. 

 

The Bottom Line 

Choosing a clean protein doesn't have to be a science project. By avoiding the obvious red flags, a complicated label, an artificial taste, and a secretive brand, you can easily find a high-quality product that will truly help you reach your goals. 

Ready to feel the difference? Explore our range of simple, clean, and all-natural proteins today. 

IMPORTANT INFORMATION: all content provided here is of a general nature only and is not a substitute for individualised professional medical advice, diagnosis or treatment and reliance should not be placed on it. For personalised medical or nutrition advice, please make an appointment with your doctor, dietitian or qualified health careprofessional.