Iso Fit- Vanilla 2LBNutrex Research Isofit 30Serv. 993g Vanilla Bean Nutrex Research Isofit is a widely known isolate whey protein since it is in its purest form and has a positive impact on one's muscles. Product description: Nutrex Research Isofit is a high quality supplement thats made in the US. We consider it a dose of happiness and pure isolated whey protein that comes in three flavors (chocolate shake, vanilla beans, and banana foster) to make your diet more