Same here. I first went vegetarian for 10+ years, still eating lots of dairy. When I made the step to "when possible not burden animals with my behavior" I noticed my digestion improved, my random all-year-round running noses disappeared and my skin cleared up significantly.
I can assure you it was not junk food vegan. All whole foods and balanced. After I obtained my genome I realized that I need more long chain Omega 3 in my diet because of my FADS1 genetic profile. You do not get that from plant based foods. It was also revealed that my Finnish heritage probably has some Inuit genetics.