Klean Athlete Klean Isolate Whey Protein vs Optimum Nutrition Gold Standard 100% Whey Protein Powder
Optimum Nutrition Gold Standard 100% Whey Protein Powder edges ahead on a protein + calorie + rating blend. Optimum Nutrition Gold Standard 100% Whey Protein Powder scores higher in that blend because it offers more protein per serving (24g vs 20g), the stronger user rating (4.6 vs 3.8).
Full side-by-side of protein, calories, macros, and protein density for Klean Athlete Klean Isolate Whey Protein and Optimum Nutrition Gold Standard 100% Whey Protein Powder below.
Klean Athlete
Wins on: Calories, Protein per 100 cal
Protein
20g
Calories
85
Protein per 100 cal
23.5g
Pros
- Lower calorie load: 85 calories vs 120.
- Better protein density: 23.5g protein per 100 calories.
Cons
- Less protein per serving: 20g vs 24g.
- Weaker review score: 3.8 vs 4.6.
Optimum Nutrition
Wins on: Protein
Protein
24g
Calories
120
Protein per 100 cal
20.0g
Pros
- More protein per serving: 24g vs 20g.
- Stronger shopper rating: 4.6 vs 3.8.
Cons
- Higher calorie count: 120 vs 85.
- Lower protein density than Klean Athlete Klean Isolate Whey Protein (20.0g vs 23.5g protein per 100 calories).
| Metric | Klean Athlete Klean Isolate Whey Protein | Optimum Nutrition Gold Standard 100% Whey Protein Powder |
|---|---|---|
| Protein | 20g | 24gBest |
| Calories | 85Best | 120 |
| Sugar | 1g | 1g |
| Fiber | — | — |
| Sodium | — | — |
| Carbs | — | — |
| Fat | — | — |
| Protein per 100 cal | 23.5gBest | 20.0g |
“Healthier” depends on your goal — here’s the real winner on every number we track, so two people with different priorities can both get the right answer.
- Protein: Optimum Nutrition Gold Standard 100% Whey Protein Powder wins, 24g vs 20g.
- Calories: Klean Athlete Klean Isolate Whey Protein wins, 85 vs 120.
- Sugar: it's a real tie — both at 1g.
- Protein per 100 cal: Klean Athlete Klean Isolate Whey Protein wins, 23.5g vs 20.0g.
Optimum Nutrition Gold Standard 100% Whey Protein Powder edges ahead on a protein + calorie + rating blend.
Optimum Nutrition Gold Standard 100% Whey Protein Powder scores higher in that blend because it offers more protein per serving (24g vs 20g), the stronger user rating (4.6 vs 3.8). This blend won’t match your priorities if sugar, carbs, or diet fit matter more to you than protein, calories, and rating.
Frequently Asked Questions
Optimum Nutrition Gold Standard 100% Whey Protein Powder has more protein per serving: 24g versus 20g.
Klean Athlete Klean Isolate Whey Protein is the lighter option at 85 calories, compared with 120 calories for the alternative.
Klean Athlete Klean Isolate Whey Protein is the more protein-dense pick at about 23.5g of protein per 100 calories.
"Healthier" depends on your goal: Optimum Nutrition Gold Standard 100% Whey Protein Powder has more protein (24g vs 20g); Klean Athlete Klean Isolate Whey Protein is lower in calories (85 vs 120). Neither is objectively the "healthiest" for everyone — see the pick-by-priority breakdown above, or try our free AI Snack Finder to get matched to your specific goal.
Optimum Nutrition Gold Standard 100% Whey Protein Powder edges ahead on a protein + calorie + rating blend. Optimum Nutrition Gold Standard 100% Whey Protein Powder scores higher in that blend because it offers more protein per serving (24g vs 20g), the stronger user rating (4.6 vs 3.8). Because they are in the same category, this is a direct apples-to-apples comparison.
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