I work out also and like to make whey protein shakes, sometimes i even sub them for a meal.
I hope that something else is causing it cause i need my protein and some days when i have no time to make a meal i make a shake.
I dont notice any signifciant changes to my face when i make the shakes. I had one last night and another one today so ill let you know what happens.
Ill be intrested to hear from some other people about this subject.
On a side note i bought my whey powder from allsportsnutrition.com
10 pounds of protein 43 bucks with tax and shipping.
It taste unflavorfull but i put peanut butter in it and sometimes bananas to get some flava.
There called pro rated and theres 4 flavas the jugs are displayed o nthe top of that link.