Index compare
Isopure vs Optimum Nutrition: Index and $/25g
Live Amazon-tracked Isopure and Optimum Nutrition whey SKUs ranked by Index /100 and cost per 25g — not tub sticker price or affiliate listicles.
Winner rule: Winner = lowest $/25g among listings with Index ≥70 in this table.
Among Index ≥70 in this table, Optimum Nutrition leads on $/25g at $1.07 (Optimum Nutrition Gold Standard Whey Vanilla Ice Cream, Index 93).
Isopure — top Index in catalog
| Product | Index/100 | $/25g | Protein | Sugar | Type | Clean |
|---|---|---|---|---|---|---|
| Isopure Low Carb 100% Pure Whey Isolate Protein Powder, Lactose Free, Glu Strawberry | 95 | $1.36 | 25g | 0.0g | isolate | 6/6 clean |
| Isopure Zero Carb Whey Isolate Protein Powder, Creamy Vanilla | 84 | $1.82 | 25g | 0.0g | isolate | 6/6 clean |
| Isopure Low Carb Whey Isolate Protein Powder, Dutch Chocolate | 79 | $1.94 | 25g | 0.0g | isolate | 6/6 clean |
| Isopure Zero Carb Whey Isolate Protein Powder, Unflavored Unflavored Whey | 79 | $1.95 | 25g | 0.0g | isolate | 6/6 clean |
Optimum Nutrition — top Index in catalog
| Product | Index/100 | $/25g | Protein | Sugar | Type | Clean |
|---|---|---|---|---|---|---|
| Optimum Nutrition Gold Standard 100% Whey Protein Powder, Strawberries & Cream, 5 P Strawberries & Cream | 94 | $1.37 | 24g | 1.0g | concentrate | 6/6 clean |
| Optimum Nutrition Gold Standard Whey Vanilla Ice Cream | 93 | $1.07 | 24g | 1.0g | concentrate | 6/6 clean |
| Optimum Nutrition Gold Standard 100% Whey Protein Powder, Chocolate Peanut Butter, Chocolate Peanut Butter | 86 | $1.75 | 24g | 1.0g | concentrate | 6/6 clean |
| Optimum Nutrition Gold Standard 100% Whey Protein Powder, Cinnamon Roll, 0.68 Pound | 83 | $1.36 | 24g | 2.0g | — | 6/6 clean |
FAQ
Is Isopure better than Optimum Nutrition?
It depends on the SKU. Compare live Index /100 (clean claims, sugar, value) and $/25g on this page — brand reputation alone is not a score.
How does WheyIndex score these brands?
Index /100 weights cleanliness claims, sugar per 25g protein, and value ($/25g). Affiliate relationships never change scores. See /how-the-index-works.