(The fact that I want a source rather than calling BS speaks volumes all by itself)
Here is the background, from my brain:
Between 6 months and one year ago, a food company in China was using "Human protein" as an ingredient in soy sauce. It included bloody bandages and human hair. They got caught. They may not have even made the final product, but rather an ingredient to go in the final product.
I will search for the story; I read about it here on FR.