Gold Standard Pro Gainer
Optimum Nutrition Gold Standard Pro Gainer is a mass gainer protein powder with 60 g of protein per 165g (About 1 Scoop). It scores 39/100 on the TBPP Quality Score. We found no third-party testing certification.
Nutrition per serving
Double Chocolate flavor, from the label.
| Serving size | 165g (About 1 Scoop) |
|---|---|
| Protein | 60 g |
| Calories | 650 |
| Carbohydrates | 81 g |
| Sugar | 7 g |
| Fat | 9 g |
| Sodium | 340 mg |
| Protein by weight | 36% |
| Leucine | Not verified |
| BCAAs | Not verified |
How it scored
39 of 100 points. How we score
| Criterion | Points | Why |
|---|---|---|
| Protein density | 6 / 30 | 36% 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 | 2 / 10 | 7 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 | Mass Gainer |
|---|---|
| Protein sources | Whey Protein Isolate, Whey Protein Concentrate, Calcium Caseinate, Hydrolyzed Whey Protein |
| Third-party testing | None found |
| Sweeteners | Sucralose, Acesulfame Potassium |
| Proprietary blend | No |
| Added free amino acids | No |
| Dietary | None listed |
| Allergens | Milk, Soy |
| Made by | Optimum Nutrition (Glanbia) · USA |
| Sold at | Optimum Nutrition (official store) |
Price
$109.99–$166.49 for 5.09 lb. About $7.86 per serving, or $3.27 per 25 g of protein.
Sizes: 5.09 lb, 10.19 lb
Flavors (2)
- Double Chocolate
- Vanilla Custard
Sources
- https://www.optimumnutrition.com/en-us/products/gold-standard-pro-gainer-protein-powder
- https://www.optimumnutrition.com/en-us/products/gold-standard-pro-gainer-protein-powder.json
- https://www.optimumnutrition.com/cdn/shop/files/ONUS-gold-standard-pro-gainer_Label_Chocolate_5-09lb_14-servings.jpg
Nutrition and ingredients from the brand's US Double Chocolate 5.09 lb label image (165 g serving, 14 servings; 4 g added sugars, 5 g fiber); first ingredient is Maltodextrin, followed by a whey/casein protein blend, MCTs and a vitamin/mineral blend. Brand page states 81-82 g carbs depending on flavor. Label shows a generic 'Banned Substance Tested' mark only, so no certification listed; the European 'Gold Standard Gainer' was withdrawn from Informed Choice in 2024. Prices are brand-store list prices on 2026-10-13. Retailer carriage beyond the brand store not verified in this pass.
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.