Sure it's become politicized, but that doesn't mean that health and nutrition answers will be found in the politics of any part of the political spectrum. The answers will be found in science over the years, and neither Rush nor anyone else has all the answers today.
You won’t find the answers in the media, either. Not even from most doctors. There was a time when doctors were taught that vitamins were a wasted effort, that the best nutrition came from a balanced diet based on the “food pyramid”.