Thanks for those links. Yes, I should have been more specific, the diet I was talking about is low carb high fat (LCHF), not low carb high protein. Increased protein intake can indeed be a problem and seems to be common with low carb eaters.

Edit: Let me also add that meat consumption seems to be mostly problematic with processed meat (http://www.ncbi.nlm.nih.gov/pubmed/23497300)