Slimmer

The pink slime issue was a huge issue in 2012, if you haven't heard of it just type in "pink slime" on Google and you'll find plenty of articles. Pink slime is: "The lean finely textured beef is a low-cost product rendered from the mostly fatty outside trim of cow carcasses or leftovers from other cuts. To salvage every bit of meat, the trimmings, combined with connective tissues and cartilage, are heated at a low temperature to remove about 95 percent of the fat. The resulting product is then compressed into blocks to be mixed into ground beef and treated with ammonium hydroxide (essentially ammonia and water) to kill pathogens like E. coli and salmonella that could have emerged during the rendering process." (Zhao, Emmeline 2012, Paragraph 4) 

Personally, it doesn't taste as good as pure beef but, it's been used in meat since the 1990's. In fact people will state that pink slime is used because of weak regulations, but pink slime was the USDA's response to public outcry of E.Coli outbreaks from the 90's. The whole purpose is to disinfect the left overs of a cow and add to beef, presumably to get the most out of the cow. Pink Slime is gross, but it's only bad for health if processed incorrectly by the supplier. It may not be AS healthy as pure beef, may not taste AS good, but it is made for consumption. The ammonia involved is not the best thing for humans since it is a waste product of our bodies, so it is naturally not the healthiest thing. But, if you're eating nothing but McDonalds burgers, or eating nothing but ground beef, you should consider changing your diet to begin with. Pink slime or not, everything you can consume will be unhealthy if you consume too much of it.