If you don't physically age gracefully it's a bit sad. I think Steven Tyler can get away anything because he still looks like he did in '73. Especially from row Z backwards in an arena. As long as the Stones keep their hair and don't get fat they'll get away with the wrinkles.
But the fact of the matter is that all scientific evidence would show based upon what we know about this disease that muscle cuts - that is the meat of the animal itself - should not cause any risk to human health.
