"I was not shocked to find out that the markers they'd identified as being associated with schizophrenia aren't a complete picture or a way to detect schizophre

"I was not shocked to find out that the markers they'd identified as being associated with schizophrenia aren't a complete picture or a way to detect schizophrenia. And, I also know that genes aren't the only thing that determines whether one will suffer from schizophrenia or pancreatic cancer or most other diseases (as far as we know). I think they always presented the information without being misleading (though the government disagreed)." They were completely misleading (at least, the reports I saw were misleading). Most of the stuff they reported was taken wildly out of context -- if it weren't, a lay audience couldn't possibly understand it! But even ignoring the fact that you don't know the field (and therefore cannot possibly evaluate their claims, aside from general skepticism), a big part of the reason that you shouldn't be doing your own genetic analysis is that a lot of science is crap. Even "good" science is crap. So it's not that the markers "aren't a complete picture" -- it's that they're probably just noise, and you can't possibly know, unless the test passes all of the hurdles to get certified. You need the system, because the system is the only thing that validates results over time. Strength through redundancy. Also, for whatever it's worth: be very careful with correlating anything to their ancestry calculations. Those are pretty much crap, too.