I'm interested in seeing any research on whey. For the past couple of months I've been drinking whey shakes once a day several times per week as a meal substitute, usually lunch (I do IF and usually only eat lunch and dinner). I add heavy cream and/or yogurt and an egg yolk or two so the protein is only about 50% or less of the calories. I haven't found they have an effect either way on my weight, they're just convenient and satisfying and allow me to spend my lunch break doing something other than eating.