It's been very well-documented that different groups are more susceptible to metabolic diseases post-colonization and post-modernization/industrialization (diabetes, I would argue also alcoholism as a metabolic disease). That is why some groups have gone hard on re-adopting traditional/ancient diets. And it's the reason why some groups have overwhelming statistics on incidence of diabetes and alcoholism while eating similar diets to other groups. There are differences carried through generations. That's why it's important to have health care that recognizes those different dispositions.