How Many Foods Are Genetically Modified: Full List

Around 32 crop species have received regulatory approval for genetically modified (GM) varieties somewhere in the world, with roughly 525 distinct modification events approved across those crops as of 2020.¹ That number sounds large, but the reality at the grocery store is both simpler and more complicated. Only about a dozen GM crops are widely grown commercially, and most of them are commodity crops you never see in their whole form. Meanwhile, dozens of processed foods contain ingredients derived from GM crops, and a growing category of foods rely on GM microorganisms you never hear about on the label.

The Big Four Commodity Crops

The overwhelming majority of GM acreage worldwide belongs to four crops: soybean, corn (maize), cotton, and canola. In 2023, GM soybean covered about 101 million hectares globally, with an adoption rate of roughly 72% of all soybean planted. GM corn came in second at about 69 million hectares and a 34% global adoption rate. GM cotton occupied around 24 million hectares with an adoption rate of 76%, and GM canola covered about 10 million hectares at a 24% adoption rate.² These four crops dominate so thoroughly that they represent the vast majority of all GM farmland on the planet.

In the United States specifically, adoption rates are even higher. About 94% of soybeans and 92% of corn grown in the U.S. are genetically modified varieties.³ Sugar beets follow a similar pattern: virtually all sugar beets in the U.S. are now GM herbicide-tolerant varieties, meaning that roughly half of the granulated sugar sold domestically comes from a GM crop. Alfalfa, grown primarily as livestock feed, also has widely adopted GM varieties in North America.

Most people never encounter these crops in recognizable form. You don’t typically buy whole soybeans or raw canola. Instead, these crops enter the food system as oils, sweeteners, starches, and animal feed. That distinction matters when you’re trying to count “how many foods” are GM, because a single GM crop like corn becomes corn syrup, corn starch, corn oil, dextrose, and dozens of other ingredients that appear in thousands of packaged products.

Fresh Produce with GM Varieties

The list of whole fruits and vegetables available in GM form is surprisingly short. Here are the ones that have been commercially sold or approved for sale:

Papaya: GM papaya has been commercially grown in Hawaii since 1998 to combat papaya ringspot virus, which was devastating the local industry.⁴ The two main GM varieties, Rainbow and SunUp, use a coat protein gene from the virus itself to confer resistance.⁵ Most papaya grown in Hawaii is GM; most papaya imported from other countries is not.
Summer squash: Some yellow crookneck squash and zucchini varieties are GM, engineered for virus resistance. Adoption is modest compared to the commodity crops.
Arctic Apple: A non-browning apple developed by Okanagan Specialty Fruits, available in sliced form. The modification silences the enzyme responsible for browning when the flesh is exposed to air.
Innate Potato: Developed by Simplot, these potatoes resist bruising and produce less acrylamide when fried. Several generations have been approved, with later versions also carrying late blight resistance.
Pink Pineapple: Del Monte’s Pinkglow pineapple has modified carotenoid pathways, giving the flesh a pink color and a different flavor profile. It’s sold as a premium product.

That is genuinely the complete list of fresh GM produce you can buy in U.S. stores. Five items. The gap between 32 approved crop species and five grocery-store items tells you something about the economics of genetic modification: the technology overwhelmingly favors large-acreage commodity crops where a single trait like herbicide tolerance or insect resistance can be deployed at massive scale.

The One GM Animal

Only one genetically modified animal has been approved for food anywhere in the world. AquAdvantage salmon is an Atlantic salmon modified with a growth hormone gene from Chinook salmon and a promoter sequence from ocean pout, an eel-like fish. This combination lets the salmon produce growth hormone year-round instead of only in spring and summer, so it reaches market size in roughly half the time of conventional Atlantic salmon.⁶ The fish was approved by the U.S. FDA in 2015 and by Health Canada around the same time. It has been sold in limited quantities, though its commercial footprint remains small.

No GM poultry, cattle, or pigs are approved for food use. Research exists on GM pigs that produce less phosphorus-laden waste and on cattle with modified horn genetics, but none has reached the food supply. For now, AquAdvantage salmon stands alone.

GM Ingredients Hiding in Plain Sight

If the fresh produce list feels short, the picture changes dramatically once you look at processed foods and ingredients made with the help of genetically modified organisms.

The most widespread example is cheese. The enzyme chymosin, traditionally sourced from the stomach lining of young calves, is essential for curdling milk during cheese production.⁷ Since the late 1980s, the chymosin gene has been cloned and expressed in bacteria and yeast, and multiple companies now produce this recombinant chymosin commercially.⁸ Depending on the country, an estimated 80-90% of cheese is made using this GM-derived enzyme rather than calf-sourced rennet. Yet because the final cheese contains no modified DNA or protein from the production organism, it is not labeled as a GM food in most jurisdictions.

A newer example is soy leghemoglobin, the ingredient that gives Impossible Burger its meaty color and flavor. The heme protein is produced by fermenting yeast engineered with the gene for soy leghemoglobin.⁹ The European Food Safety Authority has assessed the safety of this ingredient, finding that the amount of heme iron it provides is comparable to what you’d get from similar quantities of conventional meat.¹⁰

Beyond these headline examples, GM microorganisms produce a wide range of food-processing enzymes and additives: lipases used in baking, amylases used in brewing, vitamins like riboflavin (B2) produced by engineered bacteria, and amino acids used as flavor enhancers. The organism itself never enters the food, but its products do. This category is enormous and almost entirely invisible to consumers.

Where Most GM Crops Actually End Up

One of the most common misconceptions about GM food is that you’re eating most of it directly. In reality, the world’s livestock populations are the largest consumers of the current generation of GM crops, with an estimated 70-90% of harvested GM plant material going into animal feed.¹¹ GM soy meal is the dominant protein supplement in poultry and swine diets across the Americas, and GM corn is a staple feed grain worldwide.

This means that when you eat conventionally raised chicken, pork, eggs, farmed fish, or dairy, the animals that produced your food were almost certainly eating GM feed. The meat, milk, and eggs themselves contain no detectable transgenic material, and no country currently requires labeling of animal products raised on GM feed. But if your concern is about supporting GM agriculture broadly rather than consuming modified DNA specifically, animal products represent the largest indirect route.

GM Foods That Came and Went

The first GM food ever sold commercially was the Flavr Savr tomato, which hit U.S. grocery shelves in 1994. It was engineered to slow the softening process during ripening by suppressing the enzyme polygalacturonase.¹² The idea was that tomatoes could be vine-ripened longer before shipping without turning to mush in transit. It worked in principle but failed commercially: production costs were high, yields were low, and consumer interest didn’t justify the premium price. It was pulled from market within a few years.

Another notable case is HoneySweet, a transgenic plum engineered for resistance to plum pox virus through RNA interference. It was deregulated in the U.S. in 2011, making it the first GM stone fruit to clear the regulatory process.¹³ Despite approval, commercial planting never materialized. Consumer resistance, limited grower interest, and the modest scale of the U.S. plum market all worked against it.

These failures illustrate something the “full list” framing obscures: regulatory approval is not the same as commercial availability. Many of the 525 approved transgenic events exist only as approved-but-unplanted varieties, laboratory successes that never found a business case. The real list of GM foods you can encounter is much shorter than the regulatory catalog suggests.

What’s Coming Next

Several GM crops are in late development stages or early commercial rollout. Golden Rice, engineered to produce beta-carotene in the grain, has been approved in the Philippines, Australia, New Zealand, and a handful of other countries. Modeling studies have estimated that substituting beta-carotene-enriched rice for regular white rice could substantially reduce the prevalence of vitamin A deficiency in countries where rice is a dietary staple, with one simulation projecting reductions in inadequacy of more than 50% among women in Bangladesh, Indonesia, and the Philippines under optimistic adoption scenarios.¹⁴ Actual field deployment has been slow, hampered by legal challenges and activist opposition, but the approvals are in place.

A purple tomato, engineered to accumulate high levels of anthocyanins (the same pigments found in blueberries and red cabbage), has received USDA deregulation and is being sold in small quantities. Analysis of the purple fruit found anthocyanin concentrations averaging about 2.8 milligrams per gram of fresh weight, compared to essentially undetectable levels in conventional tomatoes.¹⁵ That’s a meaningful dose of a compound class associated with antioxidant activity, though long-term health benefits in humans haven’t been established through clinical trials.

Researchers have also modified cottonseed to reduce gossypol, a naturally occurring toxin that makes conventional cottonseed inedible for humans. If commercialized, this could turn cotton from a fiber-and-oil crop into a protein source. Work on GM wheat, rice with improved nutritional profiles, and virus-resistant cassava continues in labs worldwide, but none of these has reached widespread commercial planting.

The Complete Working List

Pulling everything together, here are the GM crops and animals that are either currently sold or have been sold commercially for human consumption:

Soybean: Herbicide-tolerant and insect-resistant varieties. Found as oil, lecithin, protein isolate, and dozens of processed food ingredients.
Corn: Insect-resistant and herbicide-tolerant varieties. Found as corn syrup, corn starch, corn oil, dextrose, and animal feed.
Cotton: Insect-resistant varieties. Cottonseed oil is used in cooking and processed foods.
Canola: Herbicide-tolerant varieties. Canola oil is one of the most common cooking oils globally.
Sugar beet: Herbicide-tolerant varieties. Produces roughly half of U.S. granulated sugar.
Alfalfa: Herbicide-tolerant varieties. Primarily livestock feed, but alfalfa sprouts from GM varieties could enter the food chain.
Papaya: Virus-resistant varieties grown in Hawaii.
Summer squash: Virus-resistant yellow squash and zucchini varieties.
Arctic Apple: Non-browning apple, sold sliced.
Innate Potato: Reduced bruising, lower acrylamide, some with late blight resistance.
Pink Pineapple: Modified carotenoid profile, sold as a premium product.
Purple Tomato: High-anthocyanin variety, early commercial availability.
AquAdvantage Salmon: Faster-growing Atlantic salmon, the only approved GM animal for food.
Golden Rice: Beta-carotene-enriched, approved in several countries, limited deployment.

Add to that the enzyme and additive category: recombinant chymosin in cheese, soy leghemoglobin in meat analogs, and a range of processing enzymes produced by GM microorganisms.

Labeling and How to Tell

Whether you can identify GM foods on the shelf depends heavily on where you live. In the European Union, any product must be labeled as GM if it contains more than 0.9% of EU-approved GM material in any individual ingredient.³ In practice, this means very few GM-labeled products appear on European shelves, because food manufacturers reformulate to avoid the label. In the U.S., the National Bioengineered Food Disclosure Standard, which took full effect in 2022, requires disclosure of bioengineered ingredients, but allows companies to use QR codes, phone numbers, or web links instead of plain text on the package. Products from animals raised on GM feed don’t require disclosure in any major market.

The international framework for GM food safety evaluation rests on the concept of substantial equivalence, which uses existing conventional foods as the comparison baseline for assessing GM counterparts.¹⁶ If a GM crop is compositionally and nutritionally equivalent to its conventional counterpart except for the intended modification, it passes the initial safety screen. Critics argue this approach sets the bar too low; proponents counter that decades of consumption data support its adequacy for crops like GM soy and corn that have been eaten at industrial scale since the mid-1990s.

For consumers who specifically want to avoid GM foods, the “USDA Organic” label is the most reliable marker in the United States, since organic certification prohibits the intentional use of GM seed. The Non-GMO Project Verified butterfly label is a private certification that tests for GM content, though it is not government-regulated. Neither label accounts for the GM enzymes used in processing, because those don’t leave detectable residues in the final product.

How GM Content Gets Detected

Enforcing GM labeling laws requires the ability to detect transgenic material in food, and this is more challenging than it might sound. The workhorse method is quantitative PCR, which amplifies and detects specific DNA sequences introduced during genetic modification.¹⁷ Detection labs can identify both broad markers common to many GM events (like the CaMV 35S promoter used in numerous approved crops) and event-specific sequences unique to a particular approved variety.

The trouble comes with highly processed foods. Refined oils, sugars, and starches may contain little or no intact DNA, making PCR detection unreliable or impossible.¹⁸ Protein-based tests that look for novel proteins expressed by GM crops face similar limitations in processed products. This creates a practical gap: the foods most likely to contain GM-derived ingredients, like cooking oils and sweeteners, are the hardest to test. Labeling compliance for these products ultimately depends on supply-chain documentation rather than laboratory verification.

Newer detection methods are expanding what’s possible. Digital PCR provides more precise quantification than traditional quantitative PCR, next-generation sequencing can identify unknown or unauthorized GM events, and loop-mediated isothermal amplification allows faster field-level screening without expensive laboratory equipment.¹⁷ These tools matter increasingly as the number of approved GM events grows and as gene-edited crops, which may carry changes as small as a single nucleotide, begin entering commerce and challenging the limits of detection.

Keeping GM and Non-GM Crops Separate

For farmers and food companies trying to maintain non-GM supply chains, co-existence with nearby GM plantings is a real operational challenge. Pollen doesn’t respect property lines. Strategies to limit cross-contamination include staggering planting times so that GM and non-GM fields don’t flower simultaneously, maintaining physical separation distances between fields, and using physical barriers or buffer zones to reduce pollen drift.¹⁹ Downstream segregation during harvesting, transport, and processing adds another layer of complexity, particularly for crops like corn and canola that are handled in bulk.

Biological containment offers a more elegant long-term solution. Researchers have explored engineering GM crops with mechanisms that disrupt their own pollination or fertilization, preventing gene flow to neighboring fields at a genetic level rather than relying solely on spatial separation.¹⁹ None of these biological containment strategies has been widely deployed commercially, but the concept is getting more attention as GM acreage continues to expand and organic premiums make contamination-free grain worth more money. For now, co-existence remains a matter of careful farm management, dedicated equipment, and identity-preserved supply chains that trace grain from field to finished product.

1
PubMed. Genetically modified crops: current status and future prospects
2
Journal of Integrative Agriculture. Trends in the global commercialization of genetically modified crops in 2023
3
ScienceDirect. Food processor and retailer non-GMO standards in the US and EU and the driving role of regulations
4
PubMed. Development of genetically engineered resistant papaya for papaya ringspot virus in a timely manner
5
European Journal of Plant Pathology. Papaya ringspot virus resistance of transgenic Rainbow and SunUp is affected by gene dosage, plant development, and coat protein homology
6
PubMed Central. AquAdvantage Salmon – a pioneering application of biotechnology in aquaculture
7
Frontiers in Microbiology. Multiple strategies were adopted to optimize the enzymatic characteristics and improve the expression of bovine chymosin BtChy in Kluyveromyces lactis for cheese production
8
PubMed. Bovine chymosin: production by rDNA technology and application in cheese manufacture
9
Nature Biotechnology. Meat-free outsells beef
10
EFSA Journal. Safety of soy leghemoglobin from genetically modified Komagataella phaffii as a food additive
11
PubMed Central. GMOs in animal agriculture: time to consider both costs and benefits in regulatory evaluations
12
Euphytica. Commercialization of a tomato with an antisense polygalacturonase gene: The FLAVR SAVR? tomato story
13
PubMed Central. Multilocation comparison of fruit composition for ‘HoneySweet’, an RNAi based plum pox virus resistant plum
14
PubMed Central. Biofortified β-carotene rice improves vitamin A intake and reduces the prevalence of inadequacy among women and young children in a simulated analysis in Bangladesh, Indonesia, and the Philippines
15
ACS Food Science & Technology. The Purple Tomato Story; From Laboratory Bench to the Consumer
16
The Plant Journal. Assessment of the food safety issues related to genetically modified foods
17
PubMed Central. Current and new approaches in GMO detection: challenges and solutions
18
PubMed. Detection and traceability of genetically modified organisms in the food production chain
19
New Zealand Journal of Agricultural Research. Is co‐existence and/or containment of genetically modified plants possible, and is it important?