http://www.cspinet.org/nah/index.htm
This is a link to a newsletter I subscribe to that I think is excellent.  It is an unbiased and very informative newsletter that gives info on nutrition and products.  It helps people read labels on products and see through all the deceptive advertising.  It looks at claims about vitamins and products and examines the research and tells you what the "real deal" is.
Each newsletter focuses on a particular product ..for example "breakfast cereals" and rates them based on certain criteria...like calories, fibre content, sodium, added sugar etc...it helps you make informed choices when you visit the overwhelming grocery store isles filled with products!!!
Check it out for yourself!