Give you an example ~ Yoruba people whose ancestors are from a nation now known as Nigeria. Their health in the US is vastly superior to their health in Nigeria, or Brazil, or probably even Canada, France, and England.
Sweden does not outdo Minnesota! Denmark does not out perform the quality of medical service to whites of Danish origin in Indiana, nor do they live longer ~ even American pork is better ~ so our elderly eat better than in Denmark.
At the same time we treat cancer. Other countries provide palative care and let you die ~ relatively pain free ~ unless you are in Nederland, then they put you under and let you expire as soon as possible (kind of like euthenasia).
What about the Ibos?