Neu5Gc is a foreign sugar compound against which the immune system creates antibodies that lead to inflammation.

Humans can eliminate most of it, but that doesn't change the fact that it is linked with cancers and cardiac diseases.

Moreover, this article concluded that it is safe only if you don't have any other cancer-promoting lifestyle problems like smoking, excessive drinking, sedentary life, or obesity.

The obesity rate in the U.S. is 36%. So, it might not be really dangerous but it ain't completely safe either.