content: This looks official, but it's California state law http://www.leginfo.ca.gov/cgi-bin/displaycode?section=fac&group=35001-36000&file=35831-35834 Generally, when there's laws surround stuff like this, it means people are doing it.  Here's a site that links to US legislation regarding the matter.  It was in the news about 7 years ago or so, but then quickly disappeared.  http://www.disappearednews.com/2010/02/legislature-goes-after-re-pasteurized.html