I always liked this article on a mummy from ancient Egypt:
Further CT scans led physicians to conclude that the woman was about 50 when she died. She was overweight and had bad teeth. She probably had diabetes and died of bone cancer, which had spread through her body.
Considering the diet in Egypt was heavily grain based in bread/beer (being close to the Nile river to support such agriculture)....doesn't speak well for a "grain" based society and it's health.