The reasons vary, but generally they involve the belief that the safety of GMO foods has not been proven and/or the belief that more harm is being done to the environment and animal and human health.
The number of people who do not want GMO food is not known. What is known is that a large percentage of people want GMO foods in the United States to be labeled like they are in England. They want to be able to make an informed choice about the food they eat, and many do not want to eat GMO foods at all, but labeling GMO foods has come against opposition from biotech and food companies.
Most people who don't want GMO food are not convinced it is totally safe for human consumption.
A lot of people and groups are involved in the GMO controversy. Some of them are: scientists (both for and against). governments, government regulatory agencies, consumers (large numbers who do not want to eat GMO foods), groups who want GMO food labeling, organic growers, corporations (Monsanto, Dow, Syngenta, and others), and many others.
Some people believe GMO foods are equivalent to non-GMO foods and are safe to eat. Others question if either is true.
There is no evidence that currently used GMO food is any more helpful to people or the world than non-GMO food. In fact, there is anecdotal evidence that GMO crops widely grown in the United States are actually harmful to the environment, health, biodiversity, and organic farming.
GMO corn and soy are no more productive than non-GMO corn and soy.
That is exactly what some people want to do; however, the issues surrounding the use of GMO foods are vast and banning them is not likely. Some claim GMO food is necessary in order to "feed the world."
The effects of GMO food is not yet known. Though some say there are no harmful effects, others question that and claim there is anecdotal evidence that GMO foods are harmful to health.
because. well i dont know
GMO ingredients are any foods or food ingredients that have been genetically modified in a lab.
After reading the postings at the NIH.gov website it would appear that they cautiously in favor of GMO - with proper testing.
At this point in time, it appears they do, although they of course don't advertise that they do.