Is Whey Protein Powder Bad for You?

📌 Overview and Key Takeaways

Is whey protein powder bad for you?

Discover the pros and cons of whey protein supplements and explore alternatives.

Last Updated
May 23, 2026

Author and Medical Reviewer

Written by Jack, CNC

Jack is a National Academy of Sports Medicine Certified Nutrition Coach.

Disclaimer: This article is for general informational purposes only and is not a substitute for personalized medical advice. Consult a licensed healthcare professional before making changes to your diet.

The Pros and Cons of Whey

What Are the Pros of Whey Protein Powder?

Whey protein powder has long been considered to be the gold standard of protein supplements. Here are some the reasons why it is so popular:

• Complete amino acid profile: Unlike most plant-based proteins, whey contains all of the “essential” amino acids that your body needs, but cannot make on its own.
• High PDCAAS: Whey has the highest protein digestibility corrected amino acid score (PDCAAS) possible, which means it is easily digested and absorbed (J Sports Sci Med, 2004).
• Good taste and texture: Whey has a pleasant aftertaste and mouthfeel.
• Affordable and widely available: Whey is inexpensive and easy to find.

At a glance, adding whey protein powder to your diet seems like a great way to supplement your protein intake: it is nutritious, delicious, affordable, and widely available.

That said, whey protein powder is not a protein source I would recommend that anyone use.

That is because, despite the benefits, regularly consuming whey protein powder has several, considerable drawbacks.

What Are the Cons of Whey Protein Powder?

It is important to note that if you eat a balanced diet (get your protein from a variety of sources), you will be consuming all of the essential amino acids (including the BCAAs) that you need.

And seeing as excess amino acids are excreted as waste, the fact that whey is a complete protein high in BCAAs is not an advantage for most people.

Moreover, despite its benefits, whey is not a healthy choice for many individuals because:

• Whey causes digestive issues. Whey is notorious for causing digestive issues like bloating and diarrhea. This in part because it contains lactose, a sugar most adults cannot digest.
• Whey causes acne. Whey consumption stimulates the production of insulin and insulin-like growth factor, both of which have been linked to acne development (Clin Dermatol, 2009).
• Whey protein powder is ultra-processed. Whey protein supplements are made from whey protein concentrates and isolates, which are an ultra-processed derivative of whey, which is a byproduct of cheese and yogurt-making.
• Whey is not environmentally-friendly. Dairy cows and their manure produce enormous amounts of greenhouse gas emissions, the poor handling of manure and fertilizers pollute local water resources, and unsustainable dairy farming and feed production can also lead to the loss of ecologically important areas such as prairies, wetlands, and forests.

In summary, whey protein powder is not a good choice for many people, especially those with sensitive stomachs and acne-prone skin.

But the fact that it is ultra-processed is what concerns me the most.

Whey protein concentrates and isolates have been mechanically and/or chemically stripped of everything but the protein, including the enzymes, fiber, and other natural digestive aids that help you break them down.

Your digestive system does not digest them in the same way that it does whole foods, which can affect everything from satiety to gut health.

In fact, research shows that regularly eating protein concentrates and isolates can disrupt your gut microbiome, which, in turn, can contribute to a wide range of chronic diseases, including obesity, diabetes, and cancer (Nutrients, 2018; J Exp Med, 2019).

So, instead of using protein concentrates and isolates to supplement your protein intake, I recommend simply eating more high protein, whole foods.

What is the Best Alternative to Whey Protein Powder?

Egg White Protein Powder is hands down the best alternative to whey protein powder.

It is almost identical in terms of nutritional quality, has a similar taste and texture, and requires far less processing to make.

Order Samples to taste and feel the difference for yourself.

Sources

1. Journal of Sports Science & Medicine (J Sports Sci Med). Protein – Which is Best?. 2004.
2. Clinics in Dermatology (Clin Dermatol). Acne: the role of medical nutrition therapy. 2009.
3. Nutrients (Nutrients). Effect of a Protein Supplement on the Gut Microbiota of Endurance Athletes: A Randomized, Controlled, Double-Blind Pilot Study. 2018.
4. The Journal of Experimental Medicine (J Exp Med). The gut microbiome: Relationships with disease and opportunities for therapy. 2019.

Editorial Guidelines

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This article was written by a Certified Nutrition Coach and reviewed by a Registered Dietitian. We rely on peer-reviewed research and trusted medical sources, and regularly update our content to ensure accuracy and clarity.