I’ve been interested in doing one of those dna tests. There’s a few services that offer it. Lance advertises one on his podcast. I think it’s Helix.
Haven’t read this but here ya go
https://www.google.com/amp/amp.timeinc.net/health/weight-loss/helix-dna-test-diet-exercise-science
But there are others. They test your body’s “reaction” to something like 1000 foods.
50% off right now