Muscle Milk Pro Series Protein Shake - Knockout Chocolate vs Siggi's Icelandic Skyr - Vanilla
Muscle Milk Pro Series Protein Shake - Knockout Chocolate edges ahead on a protein + calorie + rating blend. Muscle Milk Pro Series Protein Shake - Knockout Chocolate scores higher in that blend because it offers more protein per serving (40g vs 15g), more protein per 100 calories (15.4g vs 13.6g).
Full side-by-side of protein, calories, macros, and protein density for Muscle Milk Pro Series Protein Shake - Knockout Chocolate and Siggi's Icelandic Skyr - Vanilla below.
Muscle Milk
Wins on: Protein, Sugar, Fiber, Carbs, Protein per 100 cal

Protein
40g
Calories
260
Protein per 100 cal
15.4g
Pros
- More protein per serving: 40g vs 15g.
- Better protein density: 15.4g protein per 100 calories.
Cons
- Higher calorie count: 260 vs 110.
- Weaker review score: 4.4 vs 4.5.
Siggi's
Wins on: Calories, Fat
Protein
15g
Calories
110
Protein per 100 cal
13.6g
Pros
- Lower calorie load: 110 calories vs 260.
- Stronger shopper rating: 4.5 vs 4.4.
Cons
- Less protein per serving: 15g vs 40g.
- Lower protein density than Muscle Milk Pro Series Protein Shake - Knockout Chocolate (13.6g vs 15.4g protein per 100 calories).
| Metric | Muscle Milk Pro Series Protein Shake - Knockout Chocolate | Siggi's Icelandic Skyr - Vanilla |
|---|---|---|
| Protein | 40gBest | 15g |
| Calories | 260 | 110Best |
| Sugar | 3gBest | 9g |
| Fiber | 1gBest | 0g |
| Sodium | — | — |
| Carbs | 9gBest | 11g |
| Fat | 6g | 0gBest |
| Protein per 100 cal | 15.4gBest | 13.6g |
“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: Muscle Milk Pro Series Protein Shake - Knockout Chocolate wins, 40g vs 15g.
- Calories: Siggi's Icelandic Skyr - Vanilla wins, 110 vs 260.
- Sugar: Muscle Milk Pro Series Protein Shake - Knockout Chocolate wins, 3g vs 9g.
- Fiber: Muscle Milk Pro Series Protein Shake - Knockout Chocolate wins, 1g vs 0g.
- Carbs: Muscle Milk Pro Series Protein Shake - Knockout Chocolate wins, 9g vs 11g.
- Fat: Siggi's Icelandic Skyr - Vanilla wins, 0g vs 6g.
- Protein per 100 cal: Muscle Milk Pro Series Protein Shake - Knockout Chocolate wins, 15.4g vs 13.6g.
Muscle Milk Pro Series Protein Shake - Knockout Chocolate edges ahead on a protein + calorie + rating blend.
Muscle Milk Pro Series Protein Shake - Knockout Chocolate scores higher in that blend because it offers more protein per serving (40g vs 15g), more protein per 100 calories (15.4g vs 13.6g). 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
Muscle Milk Pro Series Protein Shake - Knockout Chocolate has more protein per serving: 40g versus 15g.
Siggi's Icelandic Skyr - Vanilla is the lighter option at 110 calories, compared with 260 calories for the alternative.
Muscle Milk Pro Series Protein Shake - Knockout Chocolate is the more protein-dense pick at about 15.4g of protein per 100 calories.
"Healthier" depends on your goal: Muscle Milk Pro Series Protein Shake - Knockout Chocolate has more protein (40g vs 15g); Muscle Milk Pro Series Protein Shake - Knockout Chocolate has less sugar (3g vs 9g); Siggi's Icelandic Skyr - Vanilla is lower in calories (110 vs 260). 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.
Muscle Milk Pro Series Protein Shake - Knockout Chocolate edges ahead on a protein + calorie + rating blend. Muscle Milk Pro Series Protein Shake - Knockout Chocolate scores higher in that blend because it offers more protein per serving (40g vs 15g), more protein per 100 calories (15.4g vs 13.6g). They sit in different categories, so format and texture may matter as much as the raw macros.
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