IMHO there is lots of absolute crap on this thread both in the OP and the comments.
First, there is plenty of evidence that precontact Inuit suffered from osteoporosis, including several autopsies done on frozen bodies. Bones with osteoporosis do not appear different on the outside that regular bones so unless you broke those bones open you would not know it. Inuit do not live in snow year round. Check out the summer temperatues in whitehorse and yellowknife - they often reach 30 degrees celsius in summer. While some inuit eat primarily fish, a good portion of them ate caribou and othe game animals who have to have vegetation to survive.
Does anyone on this forum not know than Stephanson's diet was supplemented by the Doctors when he was on the 'all meat' diet.
On another note, I have heard that the Neaderthal bones we have show plenty of healed fractures. I have no idea if this is true or not but most HG tribes today do not have a high fracture rate so what did the Neaderthals do differently. Were they going after bigger game or did they live where there were more predators, or did they just have a poor sense of balance.