Head-to-head comparison updated for 2026. See which protein product comes out on top.
| Attribute | ||
|---|---|---|
| Brand | MyProtein | Optimum Nutrition |
| Protein / serving | 21g | 24gBest |
| Calories / serving | 103Best | 120 |
| Fat / serving | 1.9g | 1.5gBest |
| Carbs / serving | 1gBest | 3g |
| Sugar / serving | 1gBest | 1g |
| Price / serving | $0.45Best | $0.86 |
| Price / gram protein | $0.0214Best | $0.0360 |
| Overall score | 78/100Best | 76/100 |
| Value score | 95/100Best | 78/100 |
| Purity score | 78/100Best | 73/100 |
| Protein source | Whey Concentrate | Whey Blend |
| Sweetener | sucralose | sucralose |
| Certifications | None | Informed Sport |
| Dietary tags | Gluten-Free | Gluten-Free |
| Third-party tested | No | Yes |
| Buy on Amazon | Buy on Amazon |
MyProtein Impact Whey Protein is the go-to choice for anyone seeking maximum protein value without breaking the bank. With 100 servings per 5.5 lb bag at just $0.45 per serving, it delivers the lowest cost per gram of protein among major brands. Each 25g scoop provides 21g of protein with only 103 calories, giving it an impressive 84% protein-by-weight ratio for a concentrate.
Optimum Nutrition Gold Standard 100% Whey is the best-selling whey protein powder in the world, and for good reason. With 24g of protein per scoop from a tri-blend of whey isolate, concentrate, and peptides, it delivers a well-rounded amino acid profile including 5.5g of BCAAs and 11g of EAAs per serving. The Double Rich Chocolate flavor is consistently praised as one of the best-tasting protein powders on the market.
MyProtein Impact Whey Protein edges ahead with an overall score of 78 vs 76. For value, MyProtein Impact Whey Protein wins with a 95/100 value score.
AI-generated content — verify important details independently.
Last updated: March 2026
