Whey Protein Isolate (WPI)
90.0gprotein / 100g370 cal · 1.0g fat · $$$ · Quality 1.0
Skyr (Icelandic yogurt)
11.0gprotein / 100g63 cal · 0.2g fat · $$ · Quality 0.95
Whey Protein Isolate (WPI) is in a different weight class here, protein-wise: 90.0g per 100g vs Skyr (Icelandic yogurt)'s 11.0g, a 79.0g difference that's more about food category than food quality.
Whey Protein Isolate (WPI) also carries the stronger amino acid profile (highest DIAAS of any common protein source), while Skyr (Icelandic yogurt) is high biological value dairy protein.
On price, Skyr (Icelandic yogurt) wins clearly — $$ against Whey Protein Isolate (WPI)'s $$$.
Whey Protein Isolate (WPI)'s typical serving also delivers more leucine (2700mg vs Skyr (Icelandic yogurt)'s 1050mg) — relevant if the goal is maximizing the muscle-protein-synthesis trigger per meal, not just total grams.
If raw protein density is what you're optimizing for, Whey Protein Isolate (WPI) wins clearly. Choose Skyr (Icelandic yogurt) instead if its lower fat, cost, or prep time matters more to you than the extra grams.
Full nutrition comparison
| Per 100g | Whey Protein Isolate (WPI) | Skyr (Icelandic yogurt) |
|---|---|---|
| Protein | 90.0g | 11.0g |
| Calories | 370 | 63 |
| Fat | 1.0g | 0.2g |
| Carbs | 1.5g | 4.0g |
| Fiber | 0.0g | 0.0g |
| Quality score | 1.0 | 0.95 |
| Relative cost | $$$ | $$ |
| Prep time | 1 min | 0 min |
Frequently asked
Which has more protein, whey protein isolate (wpi) or skyr (icelandic yogurt)?
Whey Protein Isolate (WPI) has 90.0g of protein per 100g compared to Skyr (Icelandic yogurt)'s 11.0g.
Which is lower in calories?
Skyr (Icelandic yogurt) is lower in calories per 100g, at 63 vs the other's 370.