23andMe = http://en.wikipedia.org/wiki/Single-nucleotide_polymorphism + population genetics
But, it doesn't really give actionable results, especially if you're young and healthy.
But, it doesn't really give actionable results, especially if you're young and healthy.
But mostly this is awesome because the future is here!
Most of the stuff listed on the 23andme site is just looking at slight correlations and assuming causation. (Though there are some major correlations that strongly suggest causation.)