Pure whey isolate, double-certified (NSF Certified for Sport and Informed Sport), a stronger tier than the better-known Isopure, which carries no third-party cert.

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Called for in

• Evidence-Based Fat Loss · Layne Norton
• Evidence-Based Muscle Building · Layne Norton
• Supplements That Actually Work · Layne Norton

Experts who call for it

Layne Norton

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Tiered options are coming soon. Today, every pick above is our single vetted recommendation.