Klean Athlete Klean Isolate
Professional and Olympic athletes who need NSF-certified protein with pharmaceutical-grade purity
Ascent Native Fuel Whey Protein
Athletes who want Informed Sport-certified native whey with clean, natural ingredients
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 Ascent Native Fuel Whey Protein
Athletes who want Informed Sport-certified native whey with clean, natural ingredients
Ascent differentiates with its "native" whey process — extracting protein directly from fresh milk rather than cheese manufacturing. Informed Sport certified with zero artificial ingredients makes it a strong choice for clean-label athletes. The native whey distinction may not justify the premium over standard isolates.
Strengths
- Informed Sport certified and uses native whey isolate processed from fresh milk (not cheese byproduct)
- Zero artificial ingredients with only natural flavors and sweeteners
- 25g protein per serving with strong amino acid and BCAA profile
Limitations
- Native whey process marketing may overstate benefits vs standard isolate
- Limited flavor range compared to larger brands
- Pricing at $2.00/serving is mid-range but not budget-friendly
