It's likely that a number of products in your pantry contain genetically modified (GM) ingredients – but most of these won't be labelled as such.
GM crops are lauded as a critical part of the solution to the world's agricultural problems. But a recent CHOICE poll found that 84% of Australians are concerned about eating food with GM ingredients.
In this article we present the key controversies and spill the biotech beans on what foods may have GM ingredients, labelling requirements, and what GM crops are grown in Australia.
GM foods include or are made from a genetically modified organism (GMO), such as GM soy beans or GM yeast.
A GMO has had its genetic code deliberately changed, often by transferring genes from another species to produce beneficial new characteristics for the producer or the consumer – such as herbicide tolerance, higher crop yields, improved nutritional value or pest resistance.
There are only two commercial GM broad-acre crops grown in Australia – GM cotton and GM canola. These are both found in many margarines and frying oils.
More than 99% of planted cotton in Australia is GM.
There are three types of GM cotton in use and all are owned by Bayer or Monsanto, which are on the brink of merging. Two of these cottons are herbicide-tolerant to help the control of weeds, and the other has an inbuilt resistance to a pest, reducing the need for insecticides.
There are six types of GM canola licenced for use in Australia. All have been developed to be resistant to the herbicides used to control weeds. Five of these are owned by Bayer or Monsanto.
Other GM crops being developed and trialled around the country (but not yet commercially available) include sugarcane, safflower, banana, wheat, barley and white clover.
There are no GM animals or fish being grown or raised for food in Australia; however, meat, dairy and eggs from animals fed imported GM feedstock are available to consumers in Australia.
Triggering an allergic reaction
In 1996, researchers found that when an allergenic Brazil nut gene was transferred into a soybean, the allergenicity from the Brazil nuts was transferred too. It wasn't approved for market and, since then, the FAO and WHO say that allergenic proteins are not allowed to be transferred into a GMO.
Outcrossing of genes
Genes from GM plants can unintentionally escape into other crops or into related species in the wild. In 2000, a woman in California went into anaphylactic shock after eating corn tacos. Earlier that year, it was found that a pest-repelling GMO corn crop that was only approved for feeding animals had cross-pollinated conventional corn crops nearby that were intended for human food.
New diseases could emerge
Bacteria and viruses are sometimes used in gene modification, and some people believe this could lead to new pathogens.
Gene transfer of antibiotic resistance
Although the probability is low, gene transfer from GM foods into bacteria in our gut, or cells in our body, could occur. There are fears that antibiotic-resistant genes used as markers when creating GMOs could contribute to antibiotic resistance.
Many of the processed foods in our stores include imported GM ingredients.
|GM ingredient||Foods they are commonly found in|
|Imported GM soya||Potato chips, margarine, mayonnaise, crackers, soy tofu, soy milk, soy flour, soy lecithin, soybean oil, pastries, chocolate.|
|Imported GM corn||Corn chips, corn oil, corn flour, corn syrup. Corn foods with the kernel. Processed corn starch is a sweetener in drinks, sweets, bread, cakes, breakfast cereal, sauces, gravy mixes and syrups.|
|Imported GM sugar beet||Can be used to produce sugar used in processed foods.|
|Cottonseed oil from GM cotton||Used for frying in the food industry (e.g. for fish and chips), smallgoods casings, snack foods, baked foods, mayonnaise and salad dressings.|
|Imported GM potatoes||Potatoes in snack foods, processed potato products and other processed food.|
|GM canola||Fried foods, baked products and snack food.|
Many of the foods containing imported GM ingredients in the table above are unlikely to be labelled as containing GM ingredients.
By law, food that contains GM protein or 'novel DNA' must be labelled. And GM foods that have an altered characteristic (e.g. soy beans with increased oleic acid content) compared to the non-GM counterpart must be labelled.
However, the exemptions include:
- GM oils, sugars and starches – Highly refined foods no longer contain the GM protein, according to FSANZ. This includes corn syrup, cottonseed and canola oil.
- GM food additives or processing aids.
- Meat, dairy and eggs from animals fed GM feedstock.
- Food bought from cafes, restaurants, takeaway shops and vending machines.
- GM flavourings in a concentration of no more than 0.1%.
- Unintentionally present GM ingredients of no more than 1%.
A survey conducted by CHOICE earlier this year showed that 84% of consumers were concerned about the presence of GM ingredients in their food. However, mandatory GM food labelling is not recommended in the draft Review of Agriculture by the Productivity Commission. It states, "All GM foods must undergo a safety assessment by FSANZ, and therefore GM labelling is a consumer value issue, not a food safety issue."
Gene Ethics, a nonprofit, opposes this stance, stating in its submission to the review that removing GM labelling disadvantages consumers in favour of retailers and GM food producers: "A majority of Australians do not want to eat GM foods and should be enabled to decide what to buy at the point of sale, through good labelling."
Many believe that the dominance of the global GM seed and agrichemicals market by a handful of chemical companies (including Dow Chemical, Du Pont, Monsanto, Bayer, ChemChina and Syngenta) puts farmers in financially vulnerable situations, particularly in developing countries.
Where once farmers had choice and saved their own seeds for crop regeneration, now Monsanto has them sign a user agreement that prevents them from saving and replanting the seeds, forcing them to reinvest each season.
Research into GM seeds is tightly controlled by the agritech companies that have given themselves the power to quash the work of independent researchers. Research on genetically modified seeds is still done by independent scientists, but only studies that the seed companies have approved are published in peer-reviewed journals.
Proponents of GM foods point to benefits such as increasing crop yields, insect-pest resistance and bio-fortifying food to address vitamin deficiencies.
For example, the Banana21 project is using GM techniques to produce bananas with increased levels of vitamin A. By increasing vitamin A in a food that's a staple part of the diet in parts of Africa, it's hoped that the project will dramatically reduce instances of preventable blindness.
Studies have shown that some GM food crops produce an increase in yields and/or a reduction in pesticide use, while other GM crops can result in increased herbicide use.
Australian and imported GM foods are assessed for their safety and labelling requirements by Food Standards Australia New Zealand (FSANZ) under the Food Standards Code.
Assessments are conducted on a case-by-case basis. FSANZ look at risks that arise as a result of the altered genes, risks that come with the intended or unintended use of the product, and if any conditions of use are needed to enable the safe use of the food. It must be shown to be as safe and nutritious as its conventional counterpart.
GM crops are regulated by both the Commonwealth and state governments.
The Commonwealth Office of the Gene Technology Regulator (OGTR) regulates GM organisms under the Gene Technology Act 2000 and corresponding state and territory laws. The OGTR identifies the risks posed by a GM organism (or dealing with the GMO) to the health and safety of people and the environment. This may be during experiments, growing, transporting, importing. The GMO's safety is assessed against its conventional counterpart.
How are the states involved?
South Australia, the ACT and Tasmania all have moratoria on the growing of GM crops. Victoria lifted its ban in 2008, New South Wales has approved GM canola and GM cotton crops, and Western Australia recently lifted its restrictions on GM crops.
Mark Anderson, general manager of organic certification body NASAA, says organic farming prohibits the use of any GM organism or products.
However, because the process is tested for organic certification, and not the product, it's nearly impossible to be totally confident that no GM elements are present. For this reason NASAA uses the term non-GMO rather than GE- or GMO-free.
Nonetheless, he says organic certification is your best bet when seeking non-GMO foods as there is currently no certification for non-GMO.
Stock images: Getty, unless otherwise stated.