Okay, so it's not exactly true that I've no idea what Hemochromatosis is. Well, not any more, anyway. A while after I added the links to the page on the Hemochromatosis Foundation, I got mail from the president of the foundation himself, saying, in part:

To answer your question a little more simply than the prose
supplied by our medical director, hemochromatosis is a genetic
disorder which causes a person to absorb to much iron from the
food they eat.  Since iron is very toxic in even small amounts,
it leads to all kinds of very unpleasant effects, including,
eventualy, death.  It is, in fact, the #1 genetic killer in the
U.S., but most people (and unfortunately most doctors) don't
know anything about it.  Bummer.

And he sent me a brochure.

Don't let anyone tell you the web doesn't work.