I became interested in this last year after doing an AncestryDNA test. One website I found that you might be interested in is Promethease [0]. I haven't tried it myself yet, mostly because I am not fully comfortable with the idea of the report telling me things I don't yet know I don't want to know :)
I also found it is backed by SNPedia, and that - at least with AncestryDNA - you can download a text file containing your sequenced DNA and then grep through it for specific things you are interested in from their wiki.
(I have no idea if that's in any way sensible, however...)
BTW, I also found my Vit D absorption efficiency is not good due to gene. The blood test corroborated the DNA report. So I supplement with 10K to raise the Vit D level.
It's very important to supplement with Vit K2 combined with mega dose Vit D. Otherwise there's risk.
Both this site and Promethease helped me make some lifestyle choices that have paid off quite well. It's possible the life changes I made would help anyone, but having some guidance was definitely valuable - specifically around increased risk of T2 diabetes and exercise types that would help me.
