For nutrition in particular, I actually think epistemic techniques would be useful. The whole diet/exercise/weight loss cluster is a bit Wild West. I've read commercial gurus (who tend to be unscientific) and peer-reviewed studies (which tend to show a lack of practical knowledge, typically in that the "test" diet or exercise is often nowhere near as intense as what actual fitness buffs do.) Being aware of cognitive biases and having some crackpot-detecting mechanisms would actually be useful.

Incidentally, since I realized that it can be hard to find suitable non-political examples for use here, nutrition might be a good substitute for climate change in examining how to look at "scientific consensus."