I tend to agree with you to some extent, although I have to take issue with this reasoning: >we don't have a full understanding of how our body processes foods

I tend to agree with you to some extent, although I have to take issue with this reasoning: >we don't have a full understanding of how our body processes foods, etc to be able to model it properly. So it's not real science. We don't have a full understanding of anything, but science is what lets us get closer. The problem I have with nutrition science is rather that a lot of its results are presented with far more confidence than the evidence bears.