Soy Protein Isolate
90.0gprotein / 100g375 cal · 1.0g fat · $$ · Quality 0.9
Brown Rice Protein
78.0gprotein / 100g380 cal · 3.0g fat · $$ · Quality 0.6
Soy Protein Isolate is in a different weight class here, protein-wise: 90.0g per 100g vs Brown Rice Protein's 78.0g, a 12.0g difference that's more about food category than food quality.
Soy Protein Isolate also carries the stronger amino acid profile (one of the highest-quality plant proteins, near-complete on its own), while Brown Rice Protein is lit_estimate, low in lysine, typically blended with pea protein commercially.
Cost is roughly comparable between the two ($$), so budget isn't the deciding factor here.
Soy Protein Isolate's typical serving also delivers more leucine (2450mg vs Brown Rice Protein's 1750mg) — relevant if the goal is maximizing the muscle-protein-synthesis trigger per meal, not just total grams.
If raw protein density is what you're optimizing for, Soy Protein Isolate wins clearly. Choose Brown Rice Protein instead if its lower fat, cost, or prep time matters more to you than the extra grams.
Full nutrition comparison
| Per 100g | Soy Protein Isolate | Brown Rice Protein |
|---|---|---|
| Protein | 90.0g | 78.0g |
| Calories | 375 | 380 |
| Fat | 1.0g | 3.0g |
| Carbs | 2.0g | 8.0g |
| Fiber | 1.5g | 2.0g |
| Quality score | 0.9 | 0.6 |
| Relative cost | $$ | $$ |
| Prep time | 1 min | 1 min |
Frequently asked
Which has more protein, soy protein isolate or brown rice protein?
Soy Protein Isolate has 90.0g of protein per 100g compared to Brown Rice Protein's 78.0g.
Which is lower in calories?
Soy Protein Isolate is lower in calories per 100g, at 375 vs the other's 380.