Comparison of Purity for Select Protein Brands
Use the protein purity comparison chart below for info on purity, leucine, and lactose for select protein brands.
| Brand / Product | Flavor | Protein Purity | Leucine Level (g/20g) | Lactose Level (mg) | Info | |
|---|---|---|---|---|---|---|
| Polar Joe Blanco Whey Protein Isolate | Flavorless | 93.50% | 2860 | 56 | + | |
| Naked Whey Grass-Fed Isolate | Flavorless | 92.60% | 3050 | 100 | + | |
| Klean Athlete Klean Isolate | Flavorless | 89.70% | 2075 | 500-1499 | + | |
| ISOPURE Unflavored Protein | Flavorless | 86.20% | 2240 | 0 | + | |
| Momentus Essential Grass-Fed Whey Protein | Flavorless | 85.80% | 2480 | >500 | + | |
| Now Sports Whey Protein Isolate | Flavorless | 85.70% | 2079 | 500-1499 | + | |
| Nutricost Whey Protein Isolate Powder | Flavorless | 85.70% | * | 500-1499 | + | |
| Wicked Protein | Flavorless | 85.20% | 2074 | <21.4 | + | |
| Transparent Lab Grass-Fed Whey Protein Isolate | Flavorless | 84.10% | * | 500-1499 | + | |
| Ascent Whey Protein | Flavorless | 83.30% | 2080 | 1500-2499 | + | |
| Levels Whey Protein | Flavorless | 78.10% | 2080 | 2000 | + | |
| PE Science Select Protein Powder | Flavorless | 78.00% | * | 1500-2499 | + |
Protein purity percentage calculation data, as well as leucine and lactose values are taken directly from publicly-available, manufacturer-provided sources. * indicates that no value is readily disclosed or available. Color coding for relative reference only. Dark green indicates a value in the top 10% of tabular purity data rankings; light green, a value in the top 30%; yellow, a value between 20% and 50%; and red, a value in the bottom 20% of tabular purity data from select protein brands. See * below for further info.
Frequently Asked Questions
Why do some protein powders and protein drinks taste gritty or chalky?Coming soon...
How do you calculate protein purity?
Protein purity percentage for unflavoured protein blends is calculated as amount of protein divided by the serving size.
Can you recommend any good recipes to help meet my protein goals?
Yes! Check these recipes out!
DISCLAIMER: Gruppo Nutrition (dba Polar Joe Co) is, in no way, affiliated with any of the above companies or products. All trademarks, service marks and company names are the property of their respective owners. We make no claim to efficacy of products listed above per individual athlete. Indeed, many of the products listed above are high-quality and exceptional in their own regard. We have made every effort to present the comparison in a clear, transparent, and objective manner based on information directly advertised or offered by the product manufacturers. *Data as of 03/05/2025; values may have changed since last update. Please confirm with manufacturer(s) before use or purchase choices.