Just because the first airplanes weren't especially safe doesn't mean they didn't become safer. Ultimately, animal studies will show problems with the meat, and I don't think it will be especially difficult to do some good controlled side-by-side studies on animal subjects with this new meat. It will be probably at least 8-10 years before it's available at the same cost as regular meat, anyway. That's plenty of time to make sure it's nutritionally equal to good grass-fed beef. If it's not, we're not required to eat it, or to outlaw regular meat. Not every non-paleo, non-raw person in this country is a raving ethical vegan, Phil. Most of them like their meat, and the average voter in this country is omnivorous.