I don't know about the US, but I've always thought that, just like chicken pork has both white and red meat. You can sometimes see it when you slice a pork loin

I don't know about the US, but I've always thought that, just like chicken pork has both white and red meat. You can sometimes see it when you slice a pork loin [1]. [1] http://www.donaldrussell.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/p/o/pork-loin-mini-roast-01_5.jpg http://www.donaldrussell.com/media/catalog/product/cache/1/i...