An Illinois statute prohibited the manufacture or sale of milk to which had been added any fat or oil other than milk fat. The defendant was engaged in manufacturing for sale outside of the state a product composed of skimmed milk and cocoanut oil which was not deleterious to health in any way. When it was sought to recover the penalty imposed by the statute for its violation, it was claimed that the law was unconstitutional in that it deprived the defendant of property without due process of law. The court held that the statute was an invalid exercise of the police power in that it prohibited the manufacture of a product which was not harmful to the public health. People v. Carotene Products Co. (Ill. 1931) 177 N. E. 698.