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Live prices
Looking for the cheapest whey protein isolate (WPI) options at Nutrition Warehouse? This page lists WPI products sorted by price, from lowest to highest, and is current as of May 2026 with regular updates. When comparing value across different tub sizes, always check the cents per gram of protein rather than just the sticker price, since a larger container at a higher upfront cost often works out cheaper per serve. Right now, Switch Nutrition's Beef Protein Isolate starts from $19.95, making it the most affordable entry point, while options like Amazonia Raw Protein Isolate at $45.95 offer plant-based alternatives at around 11 cents per gram of protein. The range includes traditional whey isolates alongside beef, egg white, and vegan isolate options, so you'll find both animal and plant-based choices depending on your dietary preferences.
Check the protein per 100g, not just the price tag. A cheaper tub with less protein actually costs you more per serve.
How the live ProteinPrice Value Score is calculated
**Switch Nutrition Beef Protein Isolate** ranks 1st on this list, though it's worth noting this isn't actually WPI. It's a beef protein isolate in a tiny 120g sample size at $19.95. The value score of 10/10 reflects decent cost per gram of protein at 3.17 cents. Chocolate sea salt is the only flavour option. This works if you want to trial beef protein without committing to a full tub, but you'll need to reorder constantly for regular use.
Switch Nutrition Egg White Protein ranks 2 on this list, though it's worth noting this isn't actually WPI. At $7.49 per 100g, it sits in mid-range territory for protein powder pricing. The 600g tub is smaller than most competitors, which limits overall value despite the reasonable unit price. Being unflavoured makes it versatile for cooking or mixing into recipes without adding sweetness. It's an alternative for those avoiding dairy-based proteins.
Amazonia Raw Protein Isolate ranks 3rd on this list at $45.95 for 500g. The value score of 6.8 out of 10 sits in decent territory, though not exceptional. This is a smaller pack size compared to typical 1-3kg tubs, which explains the higher per-gram cost. It suits buyers after a plant-based option or those wanting to trial before committing to bulk. Available at Nutrition Warehouse without any current sale discount.
Ghost Clear Whey Isolate ranks 4th on this list, but don't let that fool you. At $19.63 per 100g, it's genuinely expensive for what you're getting. The 280g tub is tiny, meaning you'll burn through it quickly. Clear whey has its fans who prefer the lighter, juice-like texture over traditional shakes, and lime sorbet is a refreshing option. But you're paying a premium for the novelty format and brand name here.
Body Science Shred Protein ranks 5th on this list at $6.88 per 100g. It's a mid-range option that sits comfortably in the affordable bracket without being the absolute cheapest. The 800g tub size is smaller than some competitors, which keeps the upfront cost at $55 but means you'll restock more often. Decent value score of 7.1 out of 10 suggests it balances price and quality reasonably well for Aussie shoppers.
