Whey Protein Isolate (WPI)
90.0gprotein / 100g370 cal · 1.0g fat · $$$ · Quality 1.0
Casein Protein (micellar)
80.0gprotein / 100g360 cal · 1.5g fat · $$ · Quality 1.0
This isn't close. Whey Protein Isolate (WPI) packs 90.0g of protein per 100g against Casein Protein (micellar)'s 80.0g — a 10.0g gap driven mostly by how concentrated or diluted each food naturally is.
Neither has a meaningful edge on protein quality; they're close enough on amino acid profile that it isn't a differentiator here.
Casein Protein (micellar) is the more budget-friendly pick ($$ vs $$$ for Whey Protein Isolate (WPI)), worth weighing if cost matters more than the other differences here.
Whey Protein Isolate (WPI)'s typical serving also delivers more leucine (2700mg vs Casein Protein (micellar)'s 2300mg) — 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 Casein Protein (micellar) 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) | Casein Protein (micellar) |
|---|---|---|
| Protein | 90.0g | 80.0g |
| Calories | 370 | 360 |
| Fat | 1.0g | 1.5g |
| Carbs | 1.5g | 6.0g |
| Fiber | 0.0g | 0.0g |
| Quality score | 1.0 | 1.0 |
| Relative cost | $$$ | $$ |
| Prep time | 1 min | 2 min |
Frequently asked
Which has more protein, whey protein isolate (wpi) or casein protein (micellar)?
Whey Protein Isolate (WPI) has 90.0g of protein per 100g compared to Casein Protein (micellar)'s 80.0g.
Which is lower in calories?
Casein Protein (micellar) is lower in calories per 100g, at 360 vs the other's 370.