Science Daily is normally pretty reliable, but they really blew it this time around. Their lead paragraph:
People who follow a vegan lifestyle — strict vegetarians who try to eat no meat or animal products of any kind — may increase their risk of developing blood clots and atherosclerosis or "hardening of the arteries," which are conditions that can lead to heart attacks and stroke. That’s the conclusion of a review of dozens of articles published on the biochemistry of vegetarianism during the past 30 years.
Scary stuff, huh? It is, until you read Ginny Messina’s coverage about what the data really shows.
My take-home message: take your damned B-12!
Update: Jack Norris, RD echoes Messina’s opinion:
There’s basically nothing new here other than to say that vegetarians need to make sure they get enough B12 and omega-3.