Whey Protein Isolate (WPI)
Musashi Whey Protein Isolate (WPI) is a whey isolate protein powder with 25.3 g of protein per 1 scoop (30 g). It scores 90/100 on the TBPP Quality Score. It is Informed Sport.
Nutrition per serving
Vanilla flavor, from the label.
| Serving size | 1 scoop (30 g) |
|---|---|
| Protein | 25.3 g |
| Calories | 111 |
| Carbohydrates | 1.2 g |
| Sugar | 0.4 g |
| Fat | 0.3 g |
| Sodium | 38 mg |
| Protein by weight | 84% |
| Leucine | 2.61 g |
| BCAAs | 5.72 g |
How it scored
90 of 100 points. How we score
| Criterion | Points | Why |
|---|---|---|
| Protein density | 30 / 30 | 84% of each scoop is protein |
| Third-party testing | 25 / 25 | Lot-tested for banned substances |
| 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 | 5 / 5 | 7 of 7 label values verified |
Formula and label
| Type | Whey Isolate |
|---|---|
| Protein sources | Whey Protein Isolate |
| Third-party testing | Informed Sport |
| Sweeteners | Sucralose |
| Proprietary blend | No |
| Added free amino acids | No |
| Dietary | None listed |
| Allergens | Milk, Soy |
| Made by | Musashi · Australia |
| Sold at | Musashi (official store), Chemist Warehouse |
Price
We could not verify a current U.S. price.
Sizes: 900 g
Flavors (2)
- Vanilla
- Chocolate
Sources
- https://www.musashi.com/
- https://musashi.com/products/whey-protein-isolate
- https://musashi.com/products/whey-protein-isolate.json
Nutrition from the brand page panel for Vanilla (900 g), per 30 g serve: 463 kJ / 111 Cal, 25.3 g protein, 0.3 g fat (0.2 g saturated), 1.2 g carbs, 0.4 g sugars (0.3 g lactose), 0.2 g fibre, 38 mg sodium, BCAAs 5,720 mg, leucine 2,610 mg (naturally occurring). Chocolate is 23.5 g protein, 108 Cal, 78 mg sodium per 30 g. Ingredients (Vanilla): WPI 95% (milk, soy and sunflower lecithin), flavours, xanthan gum, sucralose; contains milk, soy. Label says only 'flavours', so flavor_system is unknown. 'Informed Sport Certified and batch tested' is stated on the brand product page. Not sold in the US; brand-store price AUD $133.49 for 900 g (30 serves), checked 2026-10-14.
Good to know
Last checked 2026-10-14. 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.