WPI vs WPC: what's the difference and which to choose?
Posted by UPROTEIN on Jun 18, 2015
Dr Muriel Moes | Accredited Dietitian
8 mins
Whether you're just starting out on your fitness journey or you're already hitting the gym consistently, choosing the right protein supplement can be overwhelming. One of the most common questions we hear from customers across Australia is: what’s the difference between WPI and WPC?
These two types of whey protein — Whey Protein Isolate (WPI) and Whey Protein Concentrate (WPC) — often look similar, but they serve slightly different purposes depending on your goals, dietary needs, and budget.
Protein powders are a staple in many training programs, helping to support muscle growth, recovery, and overall performance. However, not all protein powders are created equal. The decision between WPI vs WPC comes down to a few key factors like protein content, digestion rate, lactose levels, and cost. If you’re shopping for supplements online and want to make a smart, informed purchase, it’s essential to understand what sets these two apart.
In this article, we’ll break down everything you need to know about WPI vs WPC, so you can confidently choose the protein powder that aligns best with your health and fitness goals — whether you're trying to build lean muscle, cut body fat, or simply maintain a high-protein diet. Let's dive in.
What Is WPI?
Whey Protein Isolate (WPI) is a more highly filtered form of whey protein. It undergoes an extra filtration process that typically results in 85-90% protein per serve, with very low fat, carbs and lactose. This makes it ideal for people who are lactose intolerant or following a low-carb diet. WPI is rapidly absorbed by the body, making it a great post-workout option for quick muscle recovery and lean muscle growth.
Key Benefits of WPI:
- Low in lactose: ideal for people with lactose sensitivity.
- Faster absorption: great post-workout for muscle recovery.
- Low in fat and carbs: supports lean muscle gain and fat loss.
- High protein purity: helps meet daily protein goals efficiently.
Because of its purity and processing, WPI is more expensive than WPC, but many athletes and fitness enthusiasts prefer it for its clean profile and quick digestion.
What Is WPC?
Whey Protein Concentrate (WPC), on the other hand, is a less filtered form of whey protein. It usually contains around 70–80% protein, along with small amounts of fats, carbohydrates and lactose. Because it’s less refined, WPC retains more of the beneficial nutrients found in whole whey, such as immunoglobulins and growth factors. It’s also generally more affordable than WPI, making it a great option for beginners or anyone on a budget.
Key Benefits of WPC:
- More affordable: ideal for beginners or budget-conscious buyers.
- Retains beneficial nutrients: contains immunoglobulins and growth factors.
- Tastes creamier: due to the slightly higher fat content.
- Excellent all-round protein: supports muscle growth and recovery.
WPC is a solid choice if you’re not lactose intolerant and want a versatile protein that won’t break the bank.
WPI vs WPC: Key Differences
Here’s a quick comparison table to help you decide between WPI vs WPC.
| Feature | WPI | WPC |
|---|---|---|
| Protein Content | ~85-90% | ~70–80% |
| Fat & Carbs | Very Low | Moderate |
| Lactose Levels | Very minimal | Contains lactose |
| Absorption Speed | Fast | Medium |
| Price | $$$$ | $$ |
| Best For | Lean Muscle Growth, Shredding, Lactose Senstive | Muscle Growth, Bulking, Daily Protein Boost, Budget-Friendly |
Which One Should You Choose?
The right protein for you depends on your goals, dietary needs and budget. Consider the below product options to select the protein right for you.
Choosing WPI
- Choose WPI if you're cutting body fat, want the lowest carbohydrates, lactose sensitive, want a fast-absorbing, clean protein post-workout or simply want the best protein available then WPI is for you.
Which Uprotein product contains WPI? At Uprotein we blend several advanced formulas that combine both WPI and WPC with other beneficial ingredients, giving you the best of both worlds. However to keep things similar and focused on WPI we have two main products:
Blending WPI and Hydrolysed WPI this formula sits at the pinnacle of protein formulations with 87% protein content. With 'added' and naturally ocurring Leucine (XHL - extra high luecine) - an important amino acid for lean muscle growth, combined with digestive enzymes to support protein absorption and digestion. Available in 3 flavours.
Blended with Whey Isolate, Collagen to boost joint and skin health and electrolytes. Clear Whey Protein Water is a lighter, refreshing alternative to milky tasting protein shakes. Tasting more like cordial than a tradtional protein shake. Fast absorbed, gentle on the stomach and 99% sugar free. Available in Tropical flavour.
Choosing WPC
- Choose WPC if you're on a budget, want muscle growth and recovery, bulking or want a protein that’s great for general use.
Which Uprotein product contains WPC? At Uprotein we blend several advanced formulas that combine WPC and WPI with other beneficial ingredients, giving you the best of both worlds. However to keep things similar and focused on WPC we have three main products:
Blending WPC, WPI and Hydrolysed WPI this is our best selling formula and for good reason. A performance formula with 80% protein thats low carb plus added digestive enzymes and available in 6 natural flavours.
Blended with WPC and quality dairy MPC (milk protein concentrate), this affordable formula delivers 68% protein content with a creamy taste and texture. Ideal for those wanting to boost daily protein intake without the extras and not break the bank.
Blended with WPC, Casein, WPI and Hydrolysed WPI this feature packed formula is high in calories from gluten free wheat based carbohydrates and designed to add mass for those looking to bulk up. Available 3 natural flavours.
Final Thoughts
Understanding the difference between WPI vs WPC is a crucial step in choosing the right supplement for your fitness journey. Both offer excellent sources of protein, but their differences in processing, absorption, and cost can affect your results and satisfaction. At Uprotein, we stock a wide range of WPI and WPC blended formulas trusted by athletes across Australia. Whether you're looking to bulk, shred, build muscle or simply support a healthy lifestyle, we’ve got a protein powder to match your goals. Still need help deciding? Contact our expert team or browse our best-selling protein powders to find your perfect match today.
