Muscle Fit Protein
Weider (Morinaga) Muscle Fit Protein is a whey blend protein powder with 23.3 g of protein per 3 heaping scoops with included spoon (30 g). It scores 50/100 on the TBPP Quality Score. It is Informed Choice.
Nutrition per serving
Morinaga Cocoa flavor, from the label.
| Serving size | 3 heaping scoops with included spoon (30 g) |
|---|---|
| Protein | 23.3 g |
| Calories | 113 |
| Carbohydrates | 2.5 g |
| Sugar | Not verified |
| Fat | Not verified |
| Sodium | Not verified |
| Protein by weight | 78% |
| Leucine | Not verified |
| BCAAs | Not verified |
How it scored
50 of 100 points. How we score
| Criterion | Points | Why |
|---|---|---|
| Protein density | 22 / 30 | 78% of each scoop is protein |
| Third-party testing | 15 / 25 | Independently tested for contaminants or label accuracy |
| Label transparency | 10 / 20 | adds free amino acids that inflate the protein number |
| Sugar | 0 / 10 | Sugar not verified |
| Ingredient simplicity | 0 / 10 | Flavor system not verified |
| Verified label data | 3 / 5 | 4 of 7 label values verified |
Formula and label
| Type | Whey Blend |
|---|---|
| Protein sources | Whey Protein, Milk Protein, Calcium Caseinate |
| Third-party testing | Informed Choice |
| Sweeteners | Sugar, Glucose, Aspartame, Sucralose |
| Proprietary blend | No |
| Added free amino acids | Yes |
| Dietary | None listed |
| Allergens | Milk, Soy |
| Made by | Weider (Morinaga) (Morinaga & Co.) · Japan |
| Sold at | Amazon Japan, Rakuten, LOHACO, Create SD |
Price
We could not verify a current U.S. price.
Sizes: 340 g, 840 g
Flavors (4)
- Morinaga Cocoa
- Vanilla
- Morinaga Ramune
- Morinaga Milk Caramel
Sources
- https://www.morinaga.co.jp/weider/
- https://www.morinaga.co.jp/weider/products/musclefit/
- https://netshop.create-sd.co.jp/shop/g/g4902888722714/
- https://netshop.create-sd.co.jp/shop/g/g4902888725166/
Official Morinaga page (2026-10-14): 30 g serving, protein 23.3 g labeled for cocoa (24.5 g anhydrous; vanilla 22.8 g), flavors/sizes, ingredients, Informed Choice. Calories 113 kcal and carbs 2.5 g for cocoa from Create SD retailer label reproduction; fat (0.3-1.8 g) and salt equivalent (0.08-0.39 g) are labeled only as ranges, so fat_g and sodium_mg are null. Sugar not labeled. Cocoa and vanilla contain added glutamine (ramune and milk caramel do not); cocoa flavoring is soy-derived. Japan-only product; no US price (Create SD 840 g cocoa JPY 5,054 incl. tax).
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.