It is an imperative within health care, medicine, and public health to restore, preserve, and enhance health. Therefore, it is important to determine what kinds of enhancement are increases in health and what kinds are not. Taking as its point of departure two conceptions of health, namely, “manifest health” and “fundamental health,” the paper discusses various means used to enhance ability and well-being, and if those means, such as wheelchairs, implants, medicines, stimulants, or narcotics, enhance health. The fact that some (...) means that enhance ability or well-being are not usually considered health enhancing, for example, narcotics, constitutes a problem. The paper ends with a discussion of some suggestions about how to distinguish between those enhancements that are health related and those that are not. One plausible idea holds that an enhancement is health related when the substance, or aid, increases ability or well-being, is integrated into the body, and does not harm the individual’s fundamental health. (shrink)