It doesn't seem like a good idea to poison your customers. Maybe it's not that bad after all.
One problem that appears to be assumed away is that not all of our health problems, if any, are due to what we eat or how we eat it. I'd even suggest that our environment can be equally bad for our health. By environment, I mean the surroundings where we spend most of our waking hours, especially while we're at work. Mostly that would be the air we breathe. After that would be what we actually do most of the time. A sedentary existence, in theory, is bad for us. I say in theory, because we probably all know people who've lived to be fairly elderly who never did any really strenuous work in their life and even that needs qualifying. Ask any schoolteacher is their job is strenuous.