Whey Protein Powder

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Last Updated: Wednesday 28th October 2026 What Is Whey Protein? Whey protein is a protein made from milk. When milk is made into cheese, the liquid that separates out is whey, which is then filtered and dried into a powder. Whey protein powder is the most popular type of protein powder, and it's easy to mix with water or milk to help you reach your daily protein target. At Nutrition Warehouse, we stock over 160 whey protein powders from Genetix Nutrition, Optimum Nutrition, Rule 1 Proteins, Anabolix Nutrition, EHP Labs and more. They're part of our full protein powder range. Want to see which protein powders customers rate highest? Check out our Top 10 Protein Powders . WPI vs WPC vs Hydrolysed Whey vs Whey Blends All whey protein starts as whey, but it's filtered and processed in different ways. Here's how the four types compare: Type Protein content Lactose and fat Example Whey protein concentrate (WPC) Usually around 70% to 80% Contains some lactose and fat Pure Whey by Genetix Nutrition Whey protein isolate (WPI) Usually around 90% or more Filtered to remove more lactose and fat Lean WPI by Genetix Nutrition Hydrolysed whey (HWPI) Usually high, similar to WPI Whey that has been partly broken down Isolate (Hydrolysed WPI) by Anabolix Nutrition Whey protein blends Varies by blend A mix of WPC and WPI, sometimes with other proteins Gold Standard 100% Whey by Optimum Nutrition Protein content varies by product, so always check the nutrition panel for protein, carbs, fat and sugar per serve. How to Choose the Right Whey Protein Type: choose WPI if you want more protein and less lactose per serve, WPC or a blend for everyday value, or hydrolysed whey if you want a whey that has been partly broken down. Protein per serve: compare the grams of protein per scoop on the nutrition panel. Lactose: if you're sensitive to lactose, look at WPI, hydrolysed whey or products with added lactase. Flavour: most whey powders come in a wide range of flavours, so pick one you'll enjoy