Compare this from the government to the billions of products you could buy:  http://www.dsf.health.state.pa.us/health/cwp/view.asp?A=174&Q=242315

Shows and explains nutrition.  The gov. does play with this information.  The USDA's job is to promote domestic agriculture. 

Read more about that at http://www.hsph.harvard.edu/nutritionsource/pyramids.html, the problem with this free information is that it gets too wordy.  Scroll down to the pyramid and begin reading, if you want to skip Harvard's explaination on why they have better nutritional advice.  It's about half way down the page.