Gawd, MORE "you should eat this" options

No matter what you hear when it comes to what is best for a body, it's not 'truth'.  I don't think anyone knows what the 'truth' is, on how a person should eat. We all have similar bodies, there MUST be a "right" way to eat. But, everyone thinks theirs is the right way. Drives me crazy.

don't eat sugar
eat low carbs
eat low fat
don't eat meat
eat meat
don't eat dairy
eat dairy

Sheesh. No matter what one person/authority says, another says just the opposite. Here is another belief, from yet another doctor/authority. His belief is that people should eat a starch diet. Who knows, really. But here it is to put in with your mix of options--so you can get REALLY confused, like me!
http://drmcdougall.com/video/starch_solution.html