Health is not a set of relations between a subject and itself in any sense of either term!
Also, capitalism doesn't tell us to be unhealthy, it tells us to be "healthy"--"healthy" in the sense of being completely without any physical or psychological diseases or viruses, infections, etc. This notion of health is not a "natural" state-- in nature it is vital that organisms create antibodies to viruses and diseases are an inevitability, not a physical weakness or downfall. This is why no one is ever considered healthy anymore, because our indicators of unhealthiness are so off. You aren't a bad person and you haven't done anything wrong if you get a disease. This is one of capitalism's lies. Capitalism tells you that IF YOU JUST MAKE THE RIGHT CHOICES [in the marketplace of goods, of desire, of whatever's out there] you can attain health, which is in this system a state of being that is heirarchically better or more "natural" than unhealthiness.
The sad fact of the matter about nature is that it tends toward disorder, it tends to decay, things fall apart, people die of cancer. We will not cheat death by putting people on respirators who are nominally considered alive by the skin of a few brain waves on an EEG. We end up extending death so that all we do is die.
Capitalism has commodified everything, so that even being healthy is an object. Addiction is one of the many things capitalism has successfully used to perpetrate itself on the world, but addiction would still be here without capitalism, unfortunately. Capitalism used addiction and the whole mechanism of psychological addiction as a blueprint for its entire social dynamic strategy.
P.S. An interesting thing my mom's OB/GYN just said to her about menopause: congratulations, you're part of a generation that has outlived its own ovaries. Something to think about, human evolution and whether we've really "progressed" ...