Collagen Peptides
90.0gprotein / 100g370 cal · 0.5g fat · $$$ · Quality 0.0
Whey Protein Isolate (WPI)
90.0gprotein / 100g370 cal · 1.0g fat · $$$ · Quality 1.0
Gram for gram, Collagen Peptides and Whey Protein Isolate (WPI) are close: 90.0g vs 90.0g of protein per 100g — a difference small enough that it shouldn't be the deciding factor.
Whey Protein Isolate (WPI) pulls ahead on protein quality specifically (highest DIAAS of any common protein source), even in categories where Collagen Peptides wins on raw grams.
Cost is roughly comparable between the two ($$$), so budget isn't the deciding factor here.
For anyone avoiding dairy specifically, Collagen Peptides is the clear pick over Whey Protein Isolate (WPI).
Whey Protein Isolate (WPI)'s typical serving also delivers more leucine (2700mg vs Collagen Peptides's 400mg) — relevant if the goal is maximizing the muscle-protein-synthesis trigger per meal, not just total grams.
Protein quality is the real differentiator here: Whey Protein Isolate (WPI)'s stronger amino acid profile gives it a genuine edge for muscle-building purposes, even with similar gram counts.
Full nutrition comparison
| Per 100g | Collagen Peptides | Whey Protein Isolate (WPI) |
|---|---|---|
| Protein | 90.0g | 90.0g |
| Calories | 370 | 370 |
| Fat | 0.5g | 1.0g |
| Carbs | 0.0g | 1.5g |
| Fiber | 0.0g | 0.0g |
| Quality score | 0.0 | 1.0 |
| Relative cost | $$$ | $$$ |
| Prep time | 1 min | 1 min |
Frequently asked
Which has more protein, collagen peptides or whey protein isolate (wpi)?
Collagen Peptides has 90.0g of protein per 100g compared to Whey Protein Isolate (WPI)'s 90.0g.
Which is lower in calories?
Whey Protein Isolate (WPI) is lower in calories per 100g, at 370 vs the other's 370.