What is diet fuel rtd replace those fast food meals and greasy sugar filled snacks with usns fat free super tasty alternative usn diet fuel rtds provide a great tasting nutritious and convenient shake perfect for filling you up if youre on the go and in need of getting rid of those pesky hunger pangs that lead to you indulging in less than ideal snacks what are the benefits each pack contains 8 x 330ml bottles each bottle contains 264g of protein 0g of sucrose completely fat free is