Consider only a couple simple food sources,

http://www.pepsico.com/Brands

then consider the power of the lobbies behind them.

http://www.cato.org/publications/commentary/why-congress-should-repeal-sugar-subsidy

And it's a lot bigger than just sugar related industries...

It's easy to see why this problem continues to exist and why it won't easily go away….

Sometimes, the air you 'let in'matters less than the air you 'let out'.