Nudges are means to influence the will formation of people to make specific choices more likely. My focus is on nudges that are supposed to improve the health condition of individuals and populations over and above the direct prevention of disease. I point out epistemic and moral problems with these types of nudges, which lead to my conclusion that health-enhancing nudges fail. They fail because we cannot know which choices enhance individual health—properly understood in a holistic way—and because health-enhancing nudges (...) are often themselves bad for our health. They can be bad for our health because they assume inferior agency in their targets and accordingly regularly lead to appropriate resentment and anger—strong emotions which go along with an increased risk of health impairments. Briefly, health-enhancing nudges fail because they are based on persistent ignorance and on a presumptuous attitude. (shrink)