Klean Athlete Klean Isolate
Professional and Olympic athletes who need NSF-certified protein with pharmaceutical-grade purity
Gainful Everyday Whey Protein Powder
Consumers who want Informed Sport-certified whey with customizable flavor options
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 Gainful Everyday Whey Protein Powder
Consumers who want Informed Sport-certified whey with customizable flavor options
Gainful offers a unique approach with its customizable flavor system atop a clean, Informed Sport-certified whey base. The ingredient quality is high and the certification credible, but the premium pricing and smaller portions make it one of the more expensive options per serving.
Strengths
- Informed Sport certified with batch-level testing for banned substances
- Clean ingredient list with no artificial sweeteners, colors, or fillers
- Customizable flavor system with separate stick packs for flavor variety
Limitations
- Higher cost per serving at $2.79 due to smaller container sizes
- Unflavored base requires purchasing separate flavor sticks
- Less widely available than established brands — primarily direct-to-consumer
