I will say that nutrition as a science has a lot of problems that it is just now starting to come to terms with. Some examples.

I would argue that food is inherently political and has been turned into a moral issue. A comment saying it isn't, is not historically accurate in my opinion. Looking at how food choice has been framed and constructed in the USA alone clearly shows this.

We have also learnt to rely on expert knowledge to decide what is and isn't good to eat, this is how neoliberal expert systems work. We have taken it upon ourselves to manage and control this self-centered project and we feel good about ourselves when we choose "correct foods" as dictated by the system. These are not set in stone, modern examples of how would be discourses around saturated fats and carbohydrates.

All and all this is a huge discussion with several layers from medicalization to the framing of fatness that would require a lot more backgroung information, so it doesn't translate well to a comment on an internet forum.

I still recommend for example this book to investigate this futher: https://uncpress.org/book/9781469626475/modern-food-moral-food/

Sorry that I don't have alternative links to these.