Do organic foods still have pesticides

By Isabella Storyclaire

last updated November 18, 2024

Contributions sourced from

Organic foods not always free from pesticides

As consumers, we've been conditioned to believe that organic foods are free from hormones and pesticides. Walk into any supermarket, you will find fresh produce, canned foods, poultry, and even personal hygiene products labelled as 'organic'.

But what does buying organic produce really mean?

Food and health expert, Associate Professor Jayashree Arcot from UNSW School of Chemical Engineering, says organic farms are only certified after they have been operating under organic principles for three years, and must pass an audit and review process.

"As consumers, we know that generally, organic foods are grown and processed without synthetic chemicals. Animals are raised without growth hormones or antibiotics on a 100 percent organic diet," she says.

"However, what the consumers see labelled as organically grown food may not be organic, unless it has been certified.

"In the market, there are pesticides approved for organic agriculturethese are supposed to be low in toxicity compared to pesticides used in conventional farming.

"So just because you sell it as organic, it doesn't really mean it's pesticide free."

The proof is in the soil

Unlike conventional farming practices, organic farming does not use synthetic chemical intervention. Instead, it focuses on sustaining the natural state of the soil, often implementing practices such as crop rotation which involves changing the crop after every harvest.

This traditional agriculture method maintains the biodiversity of the soil. For crops to flourish in an organic environment, A/Prof. Arcot says, the soil needs to undergo nitrogen fixation and farmers can achieve this by first growing pulse crops.

"Pulse crops, such as any type of legumes, are highly nitrogen-dense so they effectively feed the soil the nutrients it needs," she says.

"After harvest, the soil is nourished with nitrogen, and this provides natural nutrition for the next crop to grow."

In Australia, the levels of agricultural and chemical residues that are allowed in domestic and imported foods are set by Food Standards Australia and New Zealand (FSANZ).

A/Prof. Arcot says even though pesticides are used in conventional farming, the levels in our fresh produce are considered safe and are not high enough to be detrimental to our health.

"Australian fruits and veggies have very low levels of pesticides, in fact, even much lower than the minimum levels set by the Environmental Protection Agency in the US," she says.

"It's been shown that the levels of pesticides found in the produce we eat is actually a hundred times lower than the smallest dose that could be harmful to lab animals.

"So, people should not be alarmed if they do not purchase organic products."

Check the label

Food labelling should help consumers make an informed decision, but it can often leave them even more confused.

In Australia, there is no mandatory certification requirement for organic produce sold domestically to consumers. Despite this, many organic businesses and farmers opt for organic certification anyway to boost consumer confidence.

While Department of Agriculture, Water and the Environment is responsible for any issues concerning organic policy matters, organic certification is owned and managed by private organisations approved by Australian Biosecurity and Inspection.

So where does that leave consumers?

"Many products carry a symbol or logo to show that they are certified organic but that is not always the case," says A/Prof Arcot.

"Unless it's certified by one of these organisations, there is no way of guaranteeing the authenticity of organic produce sold to consumers.

"The onus is on us, as consumers, to do our research before buying."

Out with the old, in with the new

If a non-organic farm decides they want to transition to organic farming, even though they may pass the certification requirements, it can still take a long time for the soil to transition, A/Prof. Arcot says.

"It takes longer to convert a conventional farm into an organic farm as the soil will reflect non-organic material in the conventional plots for many years," she says.

"Even if you stop today, it doesn't mean that your crops would magically turn into pesticide-free produce the next yearthese processes can take years.

"The certification process needs to continue auditing even after farmers meet the National Standard of Organic and Biodynamic Produce."

Benefits outweigh the costs

If organic foods can still contain pesticides, why are consumers still paying a premium?

"Organic foods are generally more expensive because organic farming is labour intensive and there are much higher input costs," says A/Prof. Arcot.

"If you're not using pesticides or herbicides to ward off pests, then farmers need to do everything manuallythat increases cost."

But A/Prof. Arcot says despite the low risks that pesticides pose, there are still good reasons for buying organic foods.

"A recent review on the effect of consumption of organic foods on health shows that there may be a reduced risk of allergic disease and of overweight and obesity," she says.

"But the study was ultimately inconclusive as consumers of organic foods tend to generally have healthier lifestyles which could confound the evidence.

"However, I believe the biggest winner is our environment. While organic farming typically has lesser yields, it has a smaller carbon footprint compared to conventional agriculture which is a large emitter of greenhouse gases.

"So long-term, there are health benefits to people if we reduce any emissions in our atmosphere."

Citation:Organic foods not always free from pesticides (2021, July 5)retrieved 27 April 2024from https://phys.org/news/2021-07-foods-free-pesticides.html

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Nutrition and healthy eating

Organic foods: Are they safer? More nutritious?

Discover the difference between organic foods and their traditionally grown counterparts when it comes to nutrition, safety and price.
By Mayo Clinic Staff

Once found only in health food stores, organic food is now a common feature at most grocery stores. And that's made a bit of a problem in the produce aisle.

For example, you can pick an apple grown with usual (conventional) methods. Or you can pick one that's organic. Both apples are firm, shiny and red. They both provide vitamins and fiber. And neither apple has fat, salt or cholesterol. Which should you choose? Get the facts before you shop.

What is organic farming?

The word "organic" means the way farmers grow and process farming (agricultural) products. These products include fruits, vegetables, grains, dairy products such as milk and cheese, and meat. Organic farming practices are designed to meet the following goals:

Improve soil and water quality
Cut pollution
Provide safe, healthy places for farm animals (livestock) to live
Enable natural farm animals' behavior
Promote a self-sustaining cycle of resources on a farm

Materials or methods not allowed in organic farming include:

Artificial (synthetic) fertilizers to add nutrients to the soil
Sewage sludge as fertilizer
Most synthetic pesticides for pest control
Using radiation (irradiation) to preserve food or to get rid of disease or pests
Using genetic technology to change the genetic makeup (genetic engineering) of crops, which can improve disease or pest resistance, or to improve crop harvests
Antibiotics or growth hormones for farm animals (livestock)

Organic crop farming materials or practices may include:

Plant waste left on fields (green manure), farm animals' manure or compost to improve soil quality
Plant rotation to keep soil quality and to stop cycles of pests or disease
Cover crops that prevent wearing away of soil (erosion) when sections of land aren't in use and to plow into soil for improving soil quality
Mulch to control weeds
Insects or insect traps to control pests
Certain natural pesticides and a few synthetic pesticides approved for organic farming, used rarely and only as a last choice and coordinated with a USDA organic certifying agent

Organic farming practices for farm animals (livestock) include:

Healthy living conditions and access to the outdoors
Pasture feeding for at least 30% of farm animals' nutritional needs during grazing season
Organic food for animals
Shots to protect against disease (vaccinations)

Organic or not? Check the label

The U.S. Department of Agriculture (USDA) has set up an organic certification program that requires all organic food to meet strict government standards. These standards control how such food is grown, handled and processed.

Any product labeled as organic on the product description or packaging must be USDA certified. If it's certified, the producer may also use an official USDA Organic seal.

The USDA says producers who sell less than $5,000 a year in organic food don't need to be certified. These producers must follow the guidelines for organic food production. But they don't need to go through the certification process. They can label their products as organic. But they can't use the official USDA Organic seal.

Products certified 95 percent or more organic may display this USDA seal.

The USDA guidelines describe organic foods on product labels as:

100% organic. This label is used on certified organic fruits, vegetables, eggs, meat or other foods that have one ingredient. It may also be used on food items with many ingredients if all the items are certified organic, except for salt and water. These may have a USDA seal.
Organic. If a food with many ingredients is labeled organic, at least 95% of the ingredients are certified organic, except for salt and water. The items that aren't organic must be from a USDA list of approved additional ingredients. These also may have a USDA seal.
Made with organic. If a product with many ingredients has at least 70% certified organic ingredients, it may have a "made with organic" ingredients label. For example, a breakfast cereal might be labeled "made with organic oats." The ingredient list must show what items are organic. These products can't carry a USDA seal.
Organic ingredients. If a product has some organic ingredients but less than 70% of the ingredients are certified organic , the product can't be labeled as organic. It also can't carry a USDA seal. The ingredient list can show which ingredients are organic.

Does 'organic' mean the same thing as 'natural'?

No, "natural" and "organic" are different. Usually, "natural" on a food label means that the product has no artificial colors, flavors or preservatives. "Natural" on a label doesn't have to do with the methods or materials used to grow the food ingredients.

Also be careful not to mix up other common food labels with organic labels. For example, certified organic beef guidelines include pasture access during at least 120 days of grazing season and no growth hormones. But the labels "free-range" or "hormone-free" don't mean a farmer followed all guidelines for organic certification.

Organic food: Is it safer or more nutritious?

Some data shows possible health benefits of organic foods when compared with foods grown using the usual (conventional) process. These studies have shown differences in the food. But there is limited information to prove how these differences can give potential overall health benefits.

Potential benefits include the following:

Nutrients. Studies have shown small to moderate increases in some nutrients in organic produce. Organic produce may have more of certain antioxidants and types of flavonoids, which have antioxidant properties.
Omega-3 fatty acids. The feeding requirements for organic farm animals (livestock) usually cause higher levels of omega-3 fatty acids. These include feeding cattle grass and alfalfa. Omega-3 fatty acids a kind of fat are more heart healthy than other fats. These higher omega-3 fatty acids are found in organic meats, dairy and eggs.
Toxic metal. Cadmium is a toxic chemical naturally found in soils and absorbed by plants. Studies have shown much lower cadmium levels in organic grains, but not fruits and vegetables, when compared with crops grown using usual (conventional) methods. The lower cadmium levels in organic grains may be related to the ban on synthetic fertilizers in organic farming.
Pesticide residue. Compared with produce grown using usual (conventional) methods, organically grown produce has lower levels of pesticide residue. The safety rules for the highest levels of residue allowed on conventional produce have changed. In many cases, the levels have been lowered. Organic produce may have residue because of pesticides approved for organic farming or because of airborne pesticides from conventional farms.
Bacteria. Meats produced using usual (conventional) methods may have higher amounts of dangerous types of bacteria that may not be able to be treated with antibiotics. The overall risk of contamination of organic foods with bacteria is the same as conventional foods.

Are there downsides to buying organic?

One common concern with organic food is cost. Organic foods often cost more than similar foods grown using usual (conventional) methods. Higher prices are due, in part, to more costly ways of farming.

Food safety tips

Whether you go totally organic or choose to mix conventional and organic foods, keep these tips in mind:

Choose a variety of foods from a mix of sources. You'll get a better variety of nutrients and lower your chance of exposure to a single pesticide.
Buy fruits and vegetables in season when you can. To get the freshest produce, ask your grocer what is in season. Or buy food from your local farmers market.
Read food labels carefully. Just because a product says it's organic or has organic ingredients doesn't mean it's a healthier choice. Some organic products may still be high in sugar, salt, fat or calories.
Wash and scrub fresh fruits and vegetables well under running water. Washing helps remove dirt, germs and chemical traces from fruit and vegetable surfaces. But you can't remove all pesticide traces by washing. Throwing away the outer leaves of leafy vegetables can lessen contaminants. Peeling fruits and vegetables can remove contaminants but may also cut nutrients.

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April 22, 2022

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