Red Rex Iso Big: A Whey Isolate for Daily Protein
Red Rex Iso Big is a whey protein isolate with 26g of protein per scoop of about 30g. Isolate is whey that has been filtered further to leave more protein and less lactose, fat and carbohydrate than a standard concentrate, and it is a fast-digesting protein. The 4.63lbs tub gives about 70 servings and is available at Nutritional World. Check the listing for the flavours in stock.
Who It’s For
- Athletes and gym-goers who want a protein source to support recovery after training
- Anyone who finds it hard to reach their daily protein target from food alone
- People who prefer an isolate for its lower lactose, fat and carbohydrate content compared with concentrate
Alternatives and Related Products
Comparing isolates? Look at MuscleTech IsoWhey 2.27kg, Victor Martinez Premium Iso Whey or Nutrex Research IsoFit, or browse the full Isolate Protein category. New to isolate? Read whey protein isolate vs concentrate.

























Abdulraza –
I recently tried Red Rex Iso Big, and I’m honestly impressed with the results. I’ve been using it post-workout for the past few weeks and I can definitely feel the difference in muscle recovery and overall performance.