 Because the impact of J.S. Mill on public health ethics cannot be overstated, it is also important to recognize that Mill does not hold that in the formulation of public policies all liberty interests enjoy an equal presumption in their favor. Mill distinguishes interests that are so important that they are immune from state interference, interests that enjoy a presumption in favor of liberty, and interests that enjoy no such presumption. The harm principle figures prominently only when the second kind of liberty interest is involved. Some public health interventions target the third kind of liberty interest, which is not privileged in the same way. For example, is not clear that the interest individuals have in eating foods with trans-fats is an interest that enjoys a presumption in favor of liberty (Powers, Faden and Saghai 2012).