A group of ten doctors has called for NBC’s Dr. Oz (Dr. Mehmet Oz) to be fired from Columbia University, where he is vice chairman of the surgery department.

The Center for Media and Democracy (CMD) has long tracked the group that is connected to several of the signers attacking Dr. Oz, and CMD’s Executive Director Lisa Graves spoke with the Dr. Oz show about the background of that group and some of the signers. (CMD does not receive any funding from Dr. Oz or NBC.)

One of the doctors, Dr. Gilbert Ross, is a convicted felon who works for the American Council on Science and Health (ACSH). CMD’s updated review of ACSH’s funding confirms that it has been funded by a trade group of food corporations that heavily opposes GMO labeling.

One of ACSH’s most common activities is bashing people concerned about genetically modified organisms (GMOs) and chemicals used in factory farming.

ACSH poses as an independent science-based organization devoted to outing “junk science,” but consumer advocates have called it “a consumer front organization for its business backers” that “glove[s] the hand that feeds it.”

The majority of ACSH’s funds have come from corporations and major foundations.

CMD examined ACSH’s funding last summer and also looked into the groups when its name surfaced in 2012 in litigation involving concerns about Syngenta’s agricultural chemical, atrazine. CMD’s investigation of unsealed court documents revealed that Syngenta’s PR operation had identified ACSH as a way for it to attack and try to discredit those raising concerns about atrazine; and that ACSH was to be paid for its work defending Syngenta. Other documents that were subsequently leaked to Mother Jones confirmed that Syngenta has been funding ACSH, along with providing additional details on other corporate funders, as of two years ago.

An updated review of all available information about ACSH’s funding sources by CMD reveals that some of the hands that feed the group are not only those of the Koch brothers, Charles and David Koch, through the Koch family fortune (Koch Industries profits from petroleum products like ammonia fertilizers and other agribusiness-related operations), but also those of the Grocery Manufacturers Association (GMA), a $41.4 million trade group representing such companies as Monsanto, Campbell Soup Company, Kraft Foods, Cargill, ConAgra, General Mills, Coca Cola, and Pepsi.