I don't think he has to prove anything. Personally, I'm long past the point of feeling the need to argue about nutrition on the internet. No one is going to cha

I don't think he has to prove anything. Personally, I'm long past the point of feeling the need to argue about nutrition on the internet. No one is going to change his/her mind due to "rational debate" because all of the evidence is shit. So...I will not eat sugar, but feel free to eat as much sugar as you like. I genuinely don't care; if you develop obesity or diabetes or heart disease, you can rest easy in your epistemic conviction that sugar consumption didn't cause it. Likewise, if I develop any of those conditions, I can be absolutely sure it wasn't due to excessive sugar consumption.