10 Common Myths About GMOs

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Despite being heavily researched, genetically modified organisms—commonly called GMOs—have many myths and falsehoods surrounding them. Most of these myths are based on consumer fears and certain flawed scientific reports that purport the health risks of GMO foods.

Often referred to as “Frankenfoods” by worrisome consumers, GMOs are actually safe to consume and hold promise to be beneficial for both the environment and the economy. Learn 10 of the most common myths about GMOs.

Myth 1: Most Foods Are Now Genetically Modified

The Reality

The truth is that there are only 30 genetically modified crops available to the public. Some of the most commonly modified crops include corn (maize), alfalfa, apples, canola, cotton, papaya, potatoes, soybeans, squash and sugar beets.

Even then, many GMOs on the market today aren’t consumed by humans. Field corn, cotton, alfalfa, and soybeans are used more for animal feed than for anything else. Some have industrial uses and go toward textiles, ink, and adhesives.

While it’s true that selective breeding of crops has existed for centuries, that’s not what genetic modification (GM) really means. According to the World Health Organization, GM foods are “derived from organisms whose genetic material has been modified in a way that does not occur naturally,” which references a technology much more sophisticated than simple selective breeding.

As for salt and water, neither are living organisms—they don’t have genetic material, so it’s impossible for either to be genetically modified.

Myth 2: GMOs Hurt the Environment

The Reality

It may be easy to assume that something described as genetically modified is harmful to the environment, but the opposite is actually true. GM crops allow farmers to grow more crops using less land and fewer pesticides.

GMOs can preserve biodiversity by improving agricultural productivity, reducing chemical use, and allowing farmers to adopt conservational tillage methods.

GM crops generally require less land and certain GMOs, like HT crops, aid in soil moisture retention. For this reason, GM farms use less water than non-GM farms, aiding conservation efforts. Some GMOs are also drought-tolerant, which helps farmers preserve water in periods of drought.

GM farms also lead to improvements like less time spent on tractors to till soil (reducing emissions). PG Economics estimates that farmers in the United States who use no-till systems in corn and soybeans experience 45 to 55 percent savings in fuel usage, as opposed to conventional systems.

Additionally, the Environmental Protection Agency is part of the coordinated framework that reviews every GM crop on the market. The framework also includes the United States Department of Agriculture and the Food and Drug Administration, so rest assured that no GMO will be farmed without careful evaluation for its effects on the environment and health. 

Myth 3: Growing GMOs Is All About the Money

The Reality

While GMO crops might prove to be cost-effective, genetic engineering actually began as a way to combat the three main factors that prevent a good yield: insects, weeds, and weather. GMOs are designed to exhibit insect resistance, drought tolerance, disease resistance, and herbicide tolerance. More recent GMO qualities include reduced browning and black spotting in food crops.

GM plants that are resistant to herbicides make weed control easier and allow for less tillage and less soil erosion.

GMOs that are resistant to insects have an internal defense that repels only certain insects that would destroy the crop, which means fewer insecticides. These qualities make farming more efficient and bountiful.

There are no conspiracies or government coercion that forces farmers to grow GMO crops. Farmers are free to choose whether they grow organic, hybrid, conventional, or genetically modified seeds. Farmers choose what seeds to grow based on what is best for their farms, market demands, and the local growing environments.

Myth 4: GMOs Aren’t Safe and Haven't Been Studied

The Reality

GMOs have been heavily studied, and there is no evidence that eating GMOs harms humans. In fact, we’ve been eating GMOs for more than 20 years, probably before many people knew what GMO meant.

The first FDA-approved, commercially available GMO food was the Flavr Savr tomato. Released in 1994, scientists found a way to make this type of tomato last longer by using an altered copy of a ripening gene.

Genetically modified crops have gone through more scrutiny and evaluation than any other group of plants that humans consume. There are no peer-reviewed studies that show GMOs are harmful, but there are studies that show they’re safe to consume.

In addition, nearly every major food safety authority in the world has released a statement on the safety of genetically modified crops.

The American Association for Advancement of Science (AAAS) said that “consuming foods containing ingredients derived from GM crops is no riskier than consuming the same foods containing ingredients from crop plants modified by conventional plant improvement techniques.”

The statement goes on to say that scientific evidence proves that GM potatoes, rice, soy, and corn are just as nutritious as their non-GM counterparts.

Myth 5: GMOs Are Full of Toxic Herbicides

The Reality

Actually, genetic engineering of crops has led to less insecticide and herbicide spray. GM farming has reduced overall pesticide spray by an average of 37 percent while boosting crop yields an average of 22 percent.

Insect-resistant GMOs specifically have led to a massive reduction in the active ingredient in insecticides between 1996 and 2015.

However, there is conflicting evidence that purports an increase of a specific type of herbicide—one that plants have begun to show a resistance to. Just like bacteria exhibit antibacterial resistance in humans, plant pests can mutate to resist pesticides.

Myth 6: GMOs Cause Cancer

The Reality

The thought of eating purposely mutated food can certainly sound concerning, but current research on the health risks of GMOs is inconclusive. There is no evidence that GM foods have caused cancer in humans or animals.

To some degree, almost everything we eat is genetically altered, because animals and plants have been selectively bred for centuries. The WHO classifies only one known substance as “probably not carcinogenic to humans.” That substance is caprolactam, a substance used mostly in making nylon products like yoga pants and toothbrushes.

The other 1,012 substances they’ve classified are either carcinogenic, probably carcinogenic, possibly carcinogenic, or not classifiable due to lack of evidence.

To reduce your risk of cancer, it's good practice to:

  • eat a healthy diet rich in fruits, vegetables, and whole grains, and minimal in processed meats and packaged foods
  • quit smoking and/or using tobacco products
  • protect yourself from the sun
  • get regular medical care to catch any signs of cancer early on

Myth 7: GMOs Cause Health Problems

The Reality

Again, no scientific evidence concludes that GMOs cause health issues such as allergies, autism, celiac disease, or any other health problem.

Theoretically, genetic engineering could result in mutated proteins that cause new allergic reactions. However, all GMO crops are comprehensively and extensively evaluated before distribution, so this is unlikely.

An allergy is an immune response that occurs when a person comes into contact with an allergen, which is often a protein that a person’s body recognizes as a harmful foreign body.

According to the Food and Agriculture Organization of the United Nations (FAO) and the WHO, the structure of any new proteins in GMO crops is compared to known allergens in previous versions of the crop. This practice makes it unlikely that a new allergen would make it to the market. To date, no new allergens have been detected in approved GMO foods.

Myth 8: GMO Research Is Biased

The Reality

About half of all GMO research is independently funded, according to GENERA, a searchable database of peer-reviewed GMO research.

A separate literature review expressed that more than half (58.3 percent, or 406 out of 698 studies) of the scientific literature surrounding GMOs have no conflicts of interest. The same review reports that 25.8 percent, or 180 of the studies, presented conflicts of interest because of author affiliations or funding.

Myth 9: GMOs Increase Food Costs

The Reality

Studies show that GM farming has actually contributed to reducing the cost of food, especially when it comes to principal crops like corn and soybeans.

Other research suggests that getting rid of GMO crops would substantially increase food costs because of lower yields and negative environmental consequences (GM traits such as insect and disease resistance and weather tolerance help minimize crop loss to those adversities).

Myth 10: There Are No Long-Term Studies on GMOs

The Reality

GMOs are consistently and extensively tested for both consumer and environmental safety. All GMO tests are reviewed by the USDA, the FDA, and the Environmental Protection Agency (EPA), as well as other internal organizations.

There are several reviews of studies that report the same evidence as the statements from food safety authorities: there isn’t any evidence that shows GMO crops present adverse effects on human health or the environment.

How to Watch Your Consumption of GMOs

If you’re concerned about eating GM crops, there are several ways you can curb your intake.

  1. Be aware of the most common GMO crops: soybeans, cotton (for textile and cottonseed oil), canola (for oil), squash, sugar beets (for sugar), potatoes, and rice are all commonly modified. (See other GMO foods.)
  2. Buy organic foods. Organic foods are grown from non-GMO seeds.
  3. Buy meat and dairy from grass-fed animals. A lot of livestock is raised on GMO alfalfa and other modified feed.
  4. Buy foods labeled as non-GMO. The Non-GMO Project is a nonprofit organization that provides a rigorous verification process for brands to get the non-GMO label.
  5. Shop locally. It’s very unlikely that your local farmers’ markets sell GMO crops. Most GMO foods are grown on large-scale commercial farms, and shopping locally gives you the luxury of being able to ask the farmers about their crops.
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  • 20 questions on genetically modified foods. Food Safety.

  • Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects. Washington, DC: National Academies Press; 2004.

  • 1. Raven PH. Does the use of transgenic plants diminish or promote biodiversity? New Biotechnology. 2010;27(5):528-533. DOI: 10.1016/j.nbt.2010.07.018

  • AMA Reports of the Council on Science and Public Health. https://www.ama-assn.org/sites/ama-assn.org/files/corp/media-browser/public/hod/a12-csaph-reports_0.pdf. Published 2012.

  • Barrows G, Sexton S, Zilberman D. Agricultural Biotechnology: The Promise and Prospects of Genetically Modified Crops. Journal of Economic Perspectives. 2014;28(1):99-120. DOI: 10.1257/jep.28.1.99

  • Bruhn C, Earl R. Position of the American Dietetic Association: Agricultural and food biotechnology. J Am Diet Assoc. 2006;106(2):285-93.

  • GENERA. Viewing study.

  • Key S, Ma JK, Drake PM. Genetically modified plants and human health. J R Soc Med. 2008;101(6):290-8.

  • Klümper W, Qaim M. A Meta-Analysis of the Impacts of Genetically Modified Crops. albertini emidio, ed. PLoS ONE. 2014;9(11):e111629. DOI: 10.1371/journal.pone.0111629

  • Sánchez MA, Parrott WA. Characterization of scientific studies usually cited as evidence of adverse effects of GM food/feed. Plant Biotechnology Journal. 2017;15(10):1227-1234. DOI: 10.1111/pbi.12798

  • Snell C, Bernheim A, Bergé J-B, et al. Assessment of the health impact of GM plant diets in long-term and multigenerational animal feeding trials: A literature review. Food and Chemical Toxicology. 2012;50(3-4):1134-1148. DOI: 10.1016/j.fct.2011.11.048