Once again, totally with dpjm on this. Reptiles do not have the enzymes to properly deal with dairy products, such nutrient sources are likely to just ferment in their guts and cause discomfort.
As for the protein angle, a little while ago there was concern by Allen Repashy on the effects of his newly developed Bug Burger on feeder cockroaches (http://www.store.repashy.com/can-feeder-insect-diets-contribute-to-gout-in-reptiles.html). Now, if you read through this, you may ask "so what has this got to do with my situation?", as his concern was about how high protein supplementation to cockroaches leads to an increase in stored uric acid in the roach, which can then lead complications that lend towards gout when fed to lizards. Thing of it is, in many organisms (including reptiles) it is often been thought that excessive protein levels in the diet can lead to health issues, particularly concerning the kidneys. Most organisms do quite well for protein in their regular diets, they really don't need the supplementation of added dense protein content. With captive reptiles, most people should be more concerned with supplementing vitamins, minerals, and UVB.
Thing of it is, in many organisms (including reptiles) it is often been thought that excessive protein levels in the diet can lead to health issues, particularly concerning the kidneys.
For sure. Unfortunately, even in human diets protein is often regarded as a nutrient that you can and should consume in large amounts, the more the better. I think this notion has been fed to people for a long time, for whatever reason. But protein is something you should consume in moderation or face complications like kidney problems, bone issues, and cancer.