ISOPRO GRASS-FED NATIVE WHEY Cellucor has taken the Whey Protein Isolate category to the next level. IsoPro is engineered to be exactly what your muscles crave – pure protein. IsoPro uses a revolutionary cold filtration process that almost completely removes the unnecessary fats, lactose, carbohydrates, and cholesterol in regular Whey Protein Isolate. ISOPRO IS MADE FOR PERFORMANCE A clinical study comparing an exercise program accompanied by the consumption of PRONATIV® Native Whey against traditional WPI resulted in improvements in muscle power, recovery time, performance and muscle adaptations.*