Whey Protein Isolate (WPI)
Bulk Nutrients Whey Protein Isolate (WPI) is a whey isolate protein powder with 25.5 g of protein per approx. 1 flat scoop (30 g). It scores 64/100 on the TBPP Quality Score. We found no third-party testing certification.
Nutrition per serving
Chocolate flavor, from the label.
| Serving size | approx. 1 flat scoop (30 g) |
|---|---|
| Protein | 25.5 g |
| Calories | Not verified |
| Carbohydrates | 1.7 g |
| Sugar | 0.4 g |
| Fat | 0.5 g |
| Sodium | 65 mg |
| Protein by weight | 85% |
| Leucine | Not verified |
| BCAAs | Not verified |
How it scored
64 of 100 points. How we score
| Criterion | Points | Why |
|---|---|---|
| Protein density | 30 / 30 | 85% of each scoop is protein |
| Third-party testing | 0 / 25 | No verified independent testing program |
| Label transparency | 20 / 20 | Fully disclosed formula, no amino spiking |
| Sugar | 10 / 10 | 0.4 g sugar per serving |
| Ingredient simplicity | 0 / 10 | Flavor system not verified |
| Verified label data | 4 / 5 | 6 of 7 label values verified |
Formula and label
| Type | Whey Isolate |
|---|---|
| Protein sources | Whey Protein Isolate |
| Third-party testing | None found |
| Sweeteners | Sucralose |
| Proprietary blend | No |
| Added free amino acids | No |
| Dietary | Grass-Fed |
| Allergens | Milk |
| Made by | Bulk Nutrients · Australia |
| Sold at | bulknutrients.com.au |
Price
We could not verify a current U.S. price.
Sizes: 1 kg, 2 kg, 3 kg, 4 kg, 5 kg
Flavors (12)
- Chocolate
- Vanilla
- Banana
- Choc Honeycomb
- Salted Caramel
- Choc Peanut
- Cookies & Cream
- Iced Coffee
- Raw (Unflavoured)
- Strawberry
- Vanilla Maple
- White Choc Caramel
Sources
Nutrition from the brand's Chocolate panel per 30 g serve: 480 kJ energy, 25.5 g protein, 0.5 g fat, 1.7 g carbs, 0.4 g sugars, 65 mg sodium. The label gives energy in kJ only, so calories is null instead of a converted figure. Ingredients (flavoured): whey protein isolate (milk) with sunflower lecithin, flavouring, sucralose. The page does not say whether the flavouring is natural or artificial, so flavor_system is unknown. The grass-fed, rbST-free claim is from the brand page. The brand says batches are tested by NATA/TGA-accredited labs, but it names no certification program for this product. Not sold in the US; brand-site price is AUD $79.00 for 1 kg ($72.00/kg at 5 kg), checked 2026-10-13. The facility also processes gluten-containing ingredients.
Good to know
Last checked 2026-10-13. Labels change, so check the package before buying if you have allergies. If you are pregnant, nursing or buying for a child, ask your doctor before adding a supplement.