Gold Standard 100% Isolate
Optimum Nutrition Gold Standard 100% Isolate is a whey isolate protein powder with 25 g of protein per About 1 Scoop (31g). It scores 71/100 on the TBPP Quality Score. We found no third-party testing certification.
Nutrition per serving
Chocolate Bliss flavor, from the label.
| Serving size | About 1 Scoop (31g) |
|---|---|
| Protein | 25 g |
| Calories | 110 |
| Carbohydrates | 1 g |
| Sugar | 0 g |
| Fat | 0.5 g |
| Sodium | 190 mg |
| Protein by weight | 81% |
| Leucine | Not verified |
| BCAAs | 5.5 g |
How it scored
71 of 100 points. How we score
| Criterion | Points | Why |
|---|---|---|
| Protein density | 30 / 30 | 81% 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 g sugar per serving |
| Ingredient simplicity | 6 / 10 | Mix of natural and artificial flavors or sweeteners |
| Verified label data | 5 / 5 | 7 of 7 label values verified |
Formula and label
| Type | Whey Isolate |
|---|---|
| Protein sources | Hydrolyzed Whey Protein Isolate, Whey Protein Isolate |
| Third-party testing | None found |
| Sweeteners | Sucralose |
| Proprietary blend | No |
| Added free amino acids | No |
| Dietary | Gluten-Free |
| Allergens | Milk, Soy |
| Made by | Optimum Nutrition (Glanbia) · USA |
| Sold at | Optimum Nutrition (official store), GNC |
Price
$103.49 for 3 lb. About $2.35 per serving, or $2.35 per 25 g of protein.
Sizes: 3 lb (44 servings)
Flavors (2)
- Chocolate Bliss
- Rich Vanilla
Sources
- https://www.optimumnutrition.com/en-us/products/gold-standard-100-isolate-whey-protein-powder
- https://www.optimumnutrition.com/en-us/products/gold-standard-100-isolate-whey-protein-powder.js
- https://www.optimumnutrition.com/cdn/shop/files/ONUS-gold-standard-isolate_Label_Chocolate-Bliss_3lb_44-servings.jpg
- https://www.gnc.com/whey-protein/352560.html
Nutrition and ingredients from the brand's US Chocolate Bliss 3 lb label image; label states it is not a significant source of total sugars, recorded as 0 g. Ingredients list Natural and Artificial Flavor and Sucralose. BCAA 5.5 g and Gluten-Free from brand page. The label shows only a generic 'Banned Substance Tested' mark (no named program), so no certification is listed. Price is the brand-store list price on 2026-10-13. GNC carriage from gnc.com search results only.
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.