According to their website, The Center for Science in the Public Interest is a consumer advocacy organization whose twin missions are to conduct innovative research and advocacy programs in health and nutrition, and provide consumers with current, useful information about their health and well-being. This is not an organization you can join, per se, but you can get involved in initiatives through them. They aim to represent the citizen’s interests before regulatory, judicial and legislative bodies on food, alcohol, health, the environment, and other issues. It strives to ensure that science and technology are used for the public good and to encourage scientists to engage in public-interest activities.
Since 1971, The Center for Science in the Public Interest has been a strong advocate for nutrition and health, food safety, alcohol policy, and sound science. One thing that they produce that I recommend subscribing to is their Nutrition Action Healthletter. This newsletter always manages to provide me with some bit of information that I was not aware of before reading it. They also provide many opportunities and ideas for ways to get involved and take action for change in your own community.
I highly recommend that anyone working in the nutrition, preventative health, public health, or chronic disease management field follow this organization. They have been out in front advocating for the public interest for many years, usually before the public citizen is even aware of issues that are negatively affecting them.