General Ludd

So I hear about all these foods and supplements that are supposed to "boost the immune system". Is that really a good idea? Don't we want our immune system to be just reasonably balanced. It seems a dangerous thing to make the immune system overactive. That can lead to all sorts of crazy trouble. Of course, since most products that claim to boost the immune system do nothing of the kind, we don't have to worry about sudden increases in cases of lupus or Crohn's disease.