Which Protein Powder Is Better: Collagen or Whey?
By Stephen Eddey
We’re excited to bring you this guest article by Stephen Eddey. Stephen is a health practitioner, educator, and consultant with extensive training in chemistry, naturopathy, and health science. He has held senior technical roles in the natural health industry, including at Metagenics, and has over 10 years’ experience teaching Naturopathy. Stephen currently consults with ATP Science in Brisbane and is an accredited member of the CMA, bringing an evidence-based, preventative approach to health and education.
What Are Collagen and Whey Protein?
Collagen and whey proteins are concentrated protein fractions from different sources. Collagen protein comes from animals and is a by-product of meat production. Most collagens in Australia are made from beef, although some are made from fish. In this comparison, we will focus on beef collagen because it is the most common and most researched form. Whey protein is one of the protein fractions derived from cow’s milk and has been used for decades in the bodybuilding industry.
Amino Acid Profiles: Key Differences
Collagen and whey have different amino acid profiles. The key difference is the amino acid tryptophan. Tryptophan is an essential amino acid used in the production of the neurotransmitter serotonin. There is no tryptophan in collagen because it is not required for the production of muscle proteins. Collagen contains hydroxyproline, a specific amino acid essential for producing muscle and collagen tissue. One-third of the protein in your body is collagen.
Muscle Growth and Recovery
Both proteins can support muscle growth and recovery, and the choice largely comes down to personal preference. Direct comparisons show that whey protein is superior for muscle growth unless you use a high-quality, specific type of collagen such as BodyBalance® collagen. Collagen is more specific to certain tissues in the body, but it does not contain tryptophan.
Skin, Hair, Joint, and Gut Benefits
This is where collagen shows a distinct benefit. Collagen has been found to improve skin, hair, and joint health. Different types of collagen target different benefits. Because your gut lining is made largely of collagen, collagen supplements are less likely to cause digestive discomfort. If whey protein causes bloating or digestive upset, collagen may be the superior choice.
Digestibility and Absorption
Both collagen and whey protein, like most proteins, are typically well absorbed. There is no significant difference between them in absorption. To enhance digestibility, choose protein powders without artificial sweeteners, as these can disrupt the gut microbiome. Look for naturally sweetened collagen or whey protein products.
Best Uses: When to Choose Collagen vs. Whey
The best choice depends on your goals and preferences. Whey protein has been widely used for decades, especially among bodybuilders, and helps support muscle-building and weight-loss goals. It is also commonly used in meal replacement shakes. You can combine whey and collagen in smoothies for a balanced morning option. If your primary goals include improving skin, hair, and nails, collagen may be the better option.
Who Should Take Which?
Cost may influence your choice. High-quality collagen supplements tend to be more expensive, so whey protein may be more economical. If you are allergic to dairy or prefer to avoid it, collagen is the better option. Before taking protein supplements, focus first on whole-food sources like red meat, chicken, fish, and eggs, as they provide broader nutritional benefits.
Side Effects and Tolerability
Because collagen is naturally found in the body, it is generally well tolerated. Allergic reactions are uncommon, as one-third of the protein in your body is collagen, and your gut lining is made of collagen as well. This does not mean whey has severe side effects, but some people simply digest collagen more easily.
Cost and Value Comparison
Costs and value depend on your goals. A supplement is only expensive if you do not need it. Whenever possible, prioritise whole-food sources of protein. Supplements can become costly—sometimes hundreds of dollars per month—so use them strategically. High-quality collagen is usually more expensive but may offer better tolerability.
Which One Is Better for Your Goals?
Your goals will determine the best choice. If you tolerate both and cost is not a concern, you can choose either. If your focus is improving hair, skin, and nails, collagen may be the best option. Its hydroxyproline content, not found in whey, has been shown to support skin health. Remember that different types of collagen offer different benefits, such as joint support or muscle support. If you are unsure, consult a qualified nutritionist.
About the Author, Stephen Eddey
Stephen Eddey is a qualified health practitioner, educator, and consultant with extensive training in chemistry, naturopathy, and health science. He holds an Associate Diploma in Chemistry, a Diploma of Applied Science (Naturopathy), a Bachelor of Complementary Medicine, and a Master of Health Science, with postgraduate research focused on the treatment of obesity using low-carbohydrate diets. Stephen has held senior technical roles within the natural health industry, including Technical Consultant at Metagenics, and has over 10 years’ experience teaching Naturopathy. He currently works as a Consultant with ATP Science in Brisbane and is an accredited member of the CMA, applying an evidence-based, preventative approach to health and education.