One of the biggest mistakes that people can make in anything is taking that horrible advice of "Everything in moderation."  So let's apply that to everything else.  So you're saying everything in moderation?  Okay.  

So junk food in moderation. 

Sugar in moderation.  

Alcohol in moderation.

Heroin in moderation.

Cocaine in moderation.  

Assault in moderation. 

Genocide in moderation. 

Obviously there are things in this world that you just don't want to do or want to take part in, certainly don't want to put in your body. Cyanide in moderation?  So these are not serious arguments.  The only people that say, "Well, you need a balanced diet.  You need a balanced approach or you need to have everything in moderation," are people that just don't understand what we're biologically supposed to have and what is biologically optimal for us. The difference between success and failure happens in the margins.