I think calling nutrition is a pseudoscience is a huge disservice. It’s a rapidly growing science in its nascency. Older research suffers greatly from “correlation is not causation”. That’s the reason that ideas like “saturated fat is bad” are getting debunked now.
I am of the opinion that most every educated person with enough interest in nutrition is best off doing their own research and forming their own opinions that are backed up by scientific research. This is a great place to start: https://examine.com/