I also used to be a huge meat eater.
I now eat chicken, turkey and fish though I'm contemplating quitting all meat.
I have moved to organic fruits, veggies, Beans, certain nuts etc.
Stopped refined suger (maybe once in awhile for a rare treat only)
Stopped dairy.
Stopped processed foods.
Stopped canned foods.
Stopped pill form vitamins.
Stopped pill western medicine.
Learned to keep a more alkaline body state.
etc.
Not sure on DNA issue. ?? Who knows?
But surely I have changed greatly on a personal and spiritual level.
My wife could not believe how I have changed so much and so fast.