Rufus Wheeler Peckham, Schollenberger v. Pennsylvania…
“ Therefore, if we admit that a newly-discovered article of food might be wholly prohibited from being introduced within the limits of a state, while its properties, whether healthful or not, were still unknown, or in regard to which there might still be doubt, yet this is not the case with oleomargarine. If properly and honestly manufactured, it is conceded to be a healthful and nutritious article of food. The fact that it may be adulterated does not afford a foundation to absolutely prohibit its introduction into the state. ”
