Hydrolyzed leather protein, known as a possible carcinogen, was found in batches of dairy products in Jinhua City, Zhejiang Province, according to an article from The Epoch Times .   

An anonymous letter was sent to authorities exposing the illegal practice to boost the apparent protein content of its product, according to the article, and was later confirmed by tests that the products contained the protein.

Morning Garden, the company who produces the dairy products, is a food manufacturing company based in Lanxi City.

Experts said that leather protein is similar to melamine but different in that leather protein is harder to detect because it is a real protein that is also toxic, according to the article.