The Dietary Guidelines for Americans are reviewed and updated every five years. They provide healthy eating advice, but importantly, they are the basis of all federal nutrition policy (and a lot of state and local policy too). The first Dietary Guidelines Advisory Committee meeting will take place June 13-14 on the NIH campus in Bethesda, MD. You can view the Federal Register Notice here: http://www.ofr.gov/OFRUpload/OFRData/2013-12859_PI.pdf.
Finally, the Public Comments Database is open. The public can submit written comments throughout the Committee's advisory process. Written public comments can be submitted and/or viewed using the "Submit Comments” and "Read Comments” links, respectively on the Public Comments site.