(Our happy hour fact to amaze your drinking buddies with.)

According to a new study, vegetarians and vegans are six times more likely to suffer from brain shrinkage than meat eaters.

The link was discovered after scientists at Oxford University ran memory tests, physical checks and brain scans on 107 people between the ages of 61and 87, and then retested them five years later.

Researchers speculate the loss of brain mass in vegetarians and vegans is due to a deficiency of Vitamin B12, which is found in meat, fish and eggs. This type of brain atrophy is linked to Alzheimer's Disease and other cognitive failings.

The decision to eat meat is often attacked by veggies, but it now seems as though these kinds of affronts may just be a product of small-mindedness.

... and a few celebrities who went naked for their animal cause:

Celebs Who Strip for a Cause

    Because it's Pamela Anderson, it doesn't take much to visualize this PETA ad without the lettuce.

    PETA

    There isn't trace of "Without a Trace" star Roselyn Sanchez's clothing in this PETA PSA.

    PETA

    PETA

    Amanda Beard wasn't able to add to her seven Olympic medals during a disappointing 2008 summer games, but her decision to pose nude for PETA didn't leave her male fans disappointed.

    PETA

    PETA

    PETA

    Playing up the "Lolita" role that made her famous, Dominique Swain become PETA's youngest anti-fur spokeswoman when she struck this naughty school girl pose at the age of 21.

    PETA

    Alicia Silverstone's movie career may have slowed, but you can still see a lot of her in this PETA ad.

    PETA

    Being that Holly Madison is a professional nude model, that really isn't much of a sacrifice.

    PETA

    These days Naomi Campbell and PETA are at odds over the supermodel's habit of wearing fur. Evidence from happier times still exists.

    PETA