I've been on the quest for a truly unflavored protein also. Just today I bought "Biochem Sports 100% Whey Protein - Natural Flavor" at Whole Foods market for 12.3oz/$13. It's whey isolate like we are supposed to use and 20g protein per scoop, fat free, gluten free, lactose free. It smells a bit like powdered milk, but I took a chance and mixed a quarter scoop into my (already warm) 1/3c of mashed potatoes. It mixed in well and I couldn't taste it a bit plus it bumped my 'taters up another 5g of protein. I found a winner, at least for me. It will be great in a fruit shake or cold drink when the weather heats up. I can't tolerate brands such as Nectar. According to the can, it comes in 4 other flavors, chocolate fudge, vanilla, caramel swirl and peaches & cream. It looks like it can be found in many online shops if you don't have Whole Foods near you.