I have used maltodextrin and dexanhydrose glucose ( not sure of the spelling, the stuff is called IGNITION by LEVEL1) crystals. The dex crystals they tell me at the suppliment store is the best stuff to take, being 49 grams of carbs per serving.

What do you think is the best carb to add to my shake?

I usually do 75 grams whey isolate and 50 grams dexanhydrose glucose in waterm, then eat a normal meal about an hour later.

What is the right serviong size for a 235 male who is wanting to lean bulk?

I liked how cheap the maltodextrin was, i just bought a 5 lb container of it. I forget the name o the actual product.

What is a good economical product?