You mean that people able to resist or live longer under such a diet will survive and that we will evolve to support such a died? If so, you are probably wrong.

You mean that people able to resist or live longer under such a diet will survive and that we will evolve to support such a died? If so, you are probably wrong. It is not about survival it is about the ability to pass down genes. If the diet's problems appear later in life, it will not have a direct impact. It may have an indirect impact.