Head-to-head comparison updated for 2026. See which protein product comes out on top.
| Attribute | ||
|---|---|---|
| Brand | BulkSupplements | NOW Sports |
| Protein / serving | 27gBest | 25g |
| Calories / serving | 110Best | 110 |
| Fat / serving | 0gBest | 0.5g |
| Carbs / serving | 1gBest | 1g |
| Sugar / serving | 0gBest | 0g |
| Price / serving | $0.82Best | $0.83 |
| Price / gram protein | $0.0303Best | $0.0333 |
| Overall score | 84/100 | 88/100Best |
| Value score | 90/100Best | 85/100 |
| Purity score | 93/100 | 98/100Best |
| Protein source | Whey Isolate | Whey Isolate |
| Sweetener | none | none |
| Certifications | GMP Certified | Informed Sport, GMP Certified, Non-GMO |
| Dietary tags | Gluten-Free, Soy-Free | Gluten-Free, Soy-Free |
| Third-party tested | Yes | Yes |
| Buy on Amazon | Buy on Amazon |
BulkSupplements Whey Protein Isolate 90% is the value champion of the whey isolate category. At just $26.96 for 33 servings, it delivers 27g of protein per 30g scoop — a remarkable 90% protein-by-weight ratio that rivals the most expensive isolates on the market. The single-ingredient formula contains nothing but whey protein isolate: no sweeteners, flavors, colors, or fillers.
NOW Sports Whey Protein Isolate combines two things that rarely go together: Informed Sport certification and budget-friendly pricing. At $64.99 for 78 servings, it delivers 25g of protein per scoop at just $0.033 per gram of protein — an exceptional value for a sport-certified product. NOW Foods has been a trusted supplement manufacturer since 1968, bringing over five decades of quality assurance to every batch.
NOW Sports Whey Protein Isolate takes the lead with an overall score of 88 vs 84. For value, BulkSupplements Whey Protein Isolate 90% wins with a 90/100 value score.
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Last updated: March 2026
