Are GMOs Safe to Eat? Yes and No

Updated on August 26, 2019
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Angela, due to food sensitivities, has a great appreciation for food and its effect on the body. She strives to learn about healthy living.


What Is a GMO?

GMO stands for "genetically modified organisms." There are disagreements as to what is considered a GMO, but essentially it is a food, whether it is a plant or an animal, that has had its genetic make-up altered from its original state.

For thousands of years, humans have purposely selected seeds that were from the most ideal crops and replanted them over and over, ultimately changing the original plant into a more appealing fruit or vegetable. For example, the corn we eat today is not the same corn that was planted three thousand years ago. Through selective planting, we now are able to enjoy juicy plump yellow kernels on a cob. The same was done with animals. People would purposely breed the most ideal animals in order to get better meat.

In the past forty years, scientists have learned how to speed up this process by modifying the DNA of a plant or animal through the use of chemicals or radiation, then selectively choose which spawn to plant or breed. They may also use a gene from a different plant, bacteria, or virus and place it into a food in order to get a more desired product. It is these changes that are most often thought of as GMOs.

The reason for genetically modifying a plant is to make it beneficial or more appealing to the consumer. Sometimes plants are modified to make them resistant to disease or bugs, better-adapted to colder climates, capable of maintaining ripeness for longer periods of time, or to increase its nutritional value. Some GMOs are packed with vitamins and minerals to boost the health benefits. Others, like potatoes, are created to bruise less easily, as well as reduce the cancer-causing chemicals from being created when they are turned into french fries.

Organic and a GMO tomator
Organic and a GMO tomator | Source

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How Are They Made?

Genetic engineering occurs when a new DNA base sequence is inserted into a chromosomal DNA of an organism. The base sequence needs to be inserted in just the right spot for it to make sense in the DNA sequence for it to have the intended benefit and be recognized in the gene. Or more simply put, genetic material from one organism is transferred to the genome of another.

DNA may also be spliced together by adding a modified viral DNA to normal viral proteins in order to make a pseudo-virus that infects the cells and inserts the new DNA into the gene, without making a new virus.

This can either be done to a single cell at the beginning phase of an organism or a germ cell (sperm or egg). Once it is done to one cell, as it replicates, the new DNA sequence will continue to replicate making a new organism. This method will not necessarily lead to the new altered trait to be passed onto the next generation. In order to do that, chromosomal modifications are used.

This can be done in both plants and animals. Soy, corn, and cotton remain the most frequently modified foods in the United States according to the U.S. Department of Agriculture


Why Do People Think They Are Bad for You?

It has been found through a survey done by Pew Research Center in 2015 that more than half of United States adults believe that GMOs are harmful, despite the fact that 90 percent of scientists from the American Association for the Advancement of Science believe they are "generally safe" to eat.

Yet anytime a new technology occurs, we need to not only look at the benefits to our society, but also what could go wrong. Some fears that people have are that :

  • genetically engineered plant may spread to other fields of heirloom produce, causing to lose the original.
  • genetically engineered animals mating with non-engineered animals and producing altered offspring.
  • humans contracting an animal virus that is used to modify the chromosomes of an animal for certain benefits.
  • unknown allergens being added to a product risking the lives of people with severe allergies, such as a nut trait in another vegetable.
  • modified DNA altering a person's own DNA (addressed later in article.)
  • there are too many unknowns that could arise that have not yet been tested.

Prior to GMOs being created, chemicals and radiation were used in order to modify food to have certain traits. Some do consider this to be a GMO food, while others disagree. Ironically, radiation and chemicals being used have not had as much controversy as the idea of genetic modification occurring due to being less familiar with that method. These methods have been used on thousands of crops over the past sixty years and are still used today.

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Are They Bad for You?

Most scientists agree that GMOs are not bad for us. Changes in genes happen through natural means all the time. The theory behind evolution is based on this phenomenon. Therefore, even the items we eat today that are not genetically engineered are not the exact same foods that were eaten thousands of years ago. Few people question the safety of the items that have naturally changed over the years, but the purposeful changing of DNA makes people nervous.

The American Medical Association have deemed genetically modified foods as safe. They have been monitoring the health of humans as a result of GMOs for twenty years, and have seen no clear impacts found in any professional journals. Yet despite all the evidence supporting the safety of GMOs, there are still a few medical professionals and scientists who are leery of them and continue to study the effects on humans.

Label for non-GMO
Label for non-GMO | Source

How Does the FDA Protect Us Against Harmful GMOs?

Fortunately the FDA does monitor certain this to assure that what is sold in the United States is safe to eat. They use the Plant Biotechnology Consultation Program to monitor foods that are being engineered and making sure that they are properly tested. Their scientists will compare the genetically engineered food to the original to see if it is nutritionally different, genetically harmful, etc. For instance, a soybean that is enriched with a nut could cause people who are not allergic to soybeans have a strong adverse reaction to it due to a nut allergy. They protect us against those types of errors.

The FDA also makes sure that the impact on the environment is safe through the National Environmental Policy Act. They want to assure that animals that have been genetically modified will not spread disease. Often they will make sure modified animals will not be introduced to non-modified animals. They want to assure that the animals are not accidentally bred together, which may result in unknown adverse effects. These animals are often sterile to help prevent this from happening as well.

How Can We Make Sure Our Food Is Not Genetically Modified?

Unless a GMO food has been approved the FDA, they are not allowed to be sold within the United States, which is the same as all other food we eat. At this time the United States does not need to label them as GMO foods, although China, Australia, and the European union are required to. This may change in the near future as many states have considered passing labeling laws, but it is met with a lot of opposition. Currently there is only voluntary labeling within the US.

Unfortunately even if there were labeling laws, there are a lot of gray areas as to what should be considered genetically modified. The only items at this time that we can be certain have not been artificially modified are unprocessed foods labeled "certified organic" or "USDA organic." Unfortunately this label is allowed on genes that were originally altered by chemicals or radiation.

There is a nonprofit organization called the Non-GMO Project that has found 1,900 brands that they can confidently label "non-GMO" and "GMO free." If you want to assure that your item is not genetically modified look for the Non-GMO Project Verified seal. Other companies that label are Sprouts Farmers Market, Whole Foods, Earth Fare, and The Fresh Market, all of which are grocery stores.


Can GMOs Be Good for Your Health?

The intention of GMOs is for the betterment of society, whether it be for health, sale, or other reasons. Many of the modifications that were made were so that they would improve the nutrition in the foods, whether by making them free of viruses, resistant to bugs so they would not need pesticides, remain riper longer or add vitamins to them.

Even the meat we buy may have been altered in order to produce cows/chicken/fish/etc that have more omega-3-fatty acids. Eating the meat will help protect you from heart disease, stroke, and certain cancers, among other diseases. Biotech companies are also increasing vitamin and mineral content in many crops to make them more nutritious and help protect against diseases, especially the antioxidant level.

There are also some companies that are actually trying to reduce potential allergens, such as making a gluten-free wheat, so that way the wheat does not cause an auto-immune problem to those who are sensitive.

So theoretically GMOs could be good for your health, assuming there is no unintended health detriment that is more severe than the good it does for our body.

Can They Change Your DNA?

One of the biggest misconceptions is that by eating GMO food that you may become genetically modified yourself. Our DNA cannot be changed by what we eat. Our health can, but essentially the DNA that already exists in our body cannot be changed through eating GMO food.

Even if it could, our bodies are designed to prevent such changes, due to the bacteria fighting enzymes in our digestive system. Even if they survived these bacteria, they would need to be enough like our own DNA and attach to just the right spot in order to make any kind of impact. If that could happen, it would be just as likely to happen to the normal foods you eat that have not been genetically modified since they too have DNA of their own that is foreign to us.

Currently it is estimated that eighty percent of the foods in the United States that are processed contain GMOs, so essentially it is very difficult to escape them. Yet, just as anytime a new technology is introduced we need to not only look at the benefits it brings to our society, but also the potential risk factors. Although I am unwilling to say they are unsafe for us, I am also unwilling to say they are completely safe for us either, as I believe there are way too many unknowns, and we should proceed with caution as this or any other new technology develops.


  • Diehl, Paul. "What Exactly Is a GMO? How Do You Make One?" The Balance. Accessed April 08, 2018.
  • RD, Janet Renee MS. "Benefits You Get From a GMO." LIVESTRONG.COM. October 03, 2017. Accessed April 08, 2018.
  • Siegel, Kate. "What You Need to Know About GMOs." WebMD. Accessed April 08, 2018.

Questions & Answers

    © 2018 Angela Michelle Schultz


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      • angela_michelle profile imageAUTHOR

        Angela Michelle Schultz 

        3 months ago from United States

        I personally think we need to avoid any artificial items in our body, but I too do not stick strictly to that diet.

      • thedinasoaur profile image

        Dina AH 

        3 months ago from United States

        Angela, I do like that you are not presenting one side of the GMO discussion as the correct one. I agree with you when you say that there are plenty of unknown factors at play here. Some things require time for us to have a clearer picture. I do not avoid GMOs, mainly because I have dietary and budget restraints. What about toxins in soil and/or in produce itself? What do you think of agriculture's use of pesticides and such on plants? Thank you for a thought-provoking article!

      • profile image

        Josiah Clark 

        6 months ago

        Arnt some people gonna get mad at you for posting this. But i recomand it for the hole world to read. Thanks for posting this. It was great.

      • angela_michelle profile imageAUTHOR

        Angela Michelle Schultz 

        16 months ago from United States

        Dianna, honestly I am mixed on them. I avoid processed foods, but recognize that much of our fruit and vegetables are also genetically modified. I prefer seedless grapes and watermelons, which are both GMOs.

      • teaches12345 profile image

        Dianna Mendez 

        16 months ago

        You certainly pose a good argument on GMO tolerance. I avoid them as a rule but can see how others would be open to consuming them.

      • angela_michelle profile imageAUTHOR

        Angela Michelle Schultz 

        16 months ago from United States

        I too cannot eat gluten, yet I have an article on the health benefits of whole wheat, because I believe it is actually quite healthy for those who can eat gluten. I've never been officially diagnosed with Celiac, nor have I been tested. My doctor suggested I go gluten free, and my heath improved. Case closed.

        I do wonder though, if the reason so many have celiac disease and other food allergies is because of the GMOs in our diet now. There are so many questions I do have. I am not willing to say definitely that they are bad for us, but I cannot say confidently that they are entirely safe either.

      • MizBejabbers profile image

        Doris James MizBejabbers 

        16 months ago from Beautiful South

        This is a very interesting article and very timely. Thank you for writing it. I wish we could get answers to some of the questions that are plaguing us about GMOs today. Have you noticed that young women of today have different body shapes from those of the early to mid 1900s? Medical experts a score or so of years ago attributed their larger bodies and bigger hands and feet to better nutrition, but now they are decrying fast foods. But when I look at young women who are not overweight, most I observe seem to have straighter bodies with larger waistlines, no coke bottle figures of the 1950s through the 1970s. Which is it, natural mutation or from GMOs?

        It may be necessary to use GMOs to feed the burgeoning populations, so bodies may be adapting to the GMOs (At least I would like to think so.) rather than as a result of consuming GMOs. I have Celiac and would love to see if I can eat GMO wheat. Gluten-free bread just isn't the same as wheat bread.

        My comment doesn't mean that I think GMOs are harmless and am all for them. I'm just trying to figure out the reason for their existence, besides man's greed, that is.

      • angela_michelle profile imageAUTHOR

        Angela Michelle Schultz 

        17 months ago from United States

        RedElf, you are so punny!!!

      • RedElf profile image


        17 months ago from Canada

        Thanks for this interesting and well researched article. Lots of "food for thought" here. ***Sorry - just had to be the first one with that :)


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