Study: Vegetarian diet weakens bones.

From News.com.au:

People who live on vegetarian diets have slightly weaker bones than their meat-eating counterparts, Australian researchers said.

A joint Australian-Vietnamese study of links between the bones and diet of more than 2700 people found that vegetarians had bones 5 per cent less dense than meat-eaters, said lead researcher Tuan Nguyen.

The issue was most pronounced in vegans, who excluded all animal products from their diet and whose bones were six percent weaker, Mr Nguyen said.

There was "practically no difference" between the bones of meat-eaters and ovolactovegetarians, who excluded meat and seafood but ate eggs and dairy products, he said.