Klean Athlete Klean Isolate
Professional and Olympic athletes who need NSF-certified protein with pharmaceutical-grade purity
NOW Sports Whey Protein Isolate
Value seekers who want the most protein per dollar with Informed Sport certification
Score Comparison
Pricing & Features
Making Your Decision
When to Choose Klean Athlete Klean Isolate
Professional and Olympic athletes who need NSF-certified protein with pharmaceutical-grade purity
Klean Athlete is purpose-built for competitive athletes who cannot risk contamination. NSF Certified for Sport plus pharmaceutical-grade manufacturing standards make it one of the safest protein powders available. The unflavored single-ingredient option is ideal for purists.
Strengths
- NSF Certified for Sport — trusted by Olympic and professional athletes
- Single-ingredient unflavored option available for maximum purity
- Made by supplement industry leader (Atrium Innovations) with pharmaceutical-grade standards
Limitations
- Flavored options (Vanilla, Chocolate, Strawberry) are less sweet than mainstream competitors
- Only 20 servings per pouch at $2.20/serving is expensive
- Limited retail availability — primarily sold through specialty channels
When to Choose NOW Sports Whey Protein Isolate
Value seekers who want the most protein per dollar with Informed Sport certification
NOW Sports delivers the best value in this comparison at $0.89/serving for 81 servings. The unflavored single-ingredient isolate is as pure as it gets. Informed Sport certification adds credibility. The trade-off is taste and aesthetics — this is no-frills protein at its most practical.
Strengths
- Best protein-per-dollar value — 81 servings at $0.89/serving
- Single-ingredient unflavored option for maximum purity
- Informed Sport certified with GMP-compliant manufacturing
Limitations
- Unflavored version has a bland dairy taste — best mixed into smoothies
- Lower protein per serving (25g) in unflavored compared to some competitors
- Basic packaging and branding lacks the premium feel of boutique brands
