Sofia Martinez
Onions are believed to have several health benefits, but some people believe they can absorb toxins from their surroundings, including chemicals from plastic. While onions can be stored in plastic bags or containers, there are concerns that they may soak up harmful chemicals, such as BPA, which could potentially interfere with hormone regulation and lead to health issues. As a result, some people recommend storing onions in alternative containers like mesh bags, paper bags, or wire baskets to prevent any possible chemical leaching and maintain the onions' nutritional value.
| Characteristics | Values |
|---|---|
| Onions' ability to absorb toxins from plastic | Onions are like sponges and can absorb substances from their environment, including the chemicals found in plastic. |
| Health risks | Consuming onions stored in plastic can pose health risks due to the potential for chemical leaching. BPA, a chemical found in some plastics, can interfere with hormone regulation, leading to hormonal imbalances, reproductive issues, increased cancer risk, and developmental and behavioral problems. |
| Alternative storage options | Safe alternative containers for storing onions include mesh bags, pantyhose, brown paper bags, or wire baskets, which provide adequate ventilation to keep onions dry and fresh. |
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What You'll Learn
Onions' absorbent nature
Onions are known for their ability to absorb substances from their surroundings, a characteristic that has sparked concerns about their potential health risks when stored in plastic. This absorbent nature of onions has led to discussions and investigations into the possible dangers of storing them in plastic bags or containers.
Onions have a unique capacity to soak up chemicals, including those found in plastic. This means that if onions are stored in plastic, they can absorb these chemicals, potentially posing health hazards when consumed. The plastic may release harmful chemicals, a process known as chemical leaching, which can then be absorbed by the onions. One of the chemicals of concern is BPA, found in some plastics, which is an endocrine disruptor and can interfere with hormone regulation in the body. The consequences of BPA exposure can be severe, including hormonal imbalances, reproductive issues, increased cancer risk, and developmental and behavioural problems in children.
To avoid these potential health risks, it is recommended to store onions in alternative containers such as mesh bags, pantyhose, brown paper bags, or wire baskets. These materials provide adequate ventilation, keeping the onions dry and fresh, while also reducing the possibility of chemical leaching. By taking this simple precaution, individuals can protect their health and still enjoy the flavour and nutritional benefits that onions offer.
While the absorbent nature of onions has raised concerns about chemical absorption from plastic, it is important to note that onions have also been recognised for their ability to absorb bacteria. Some sources suggest that cutting an onion triggers a chemical reaction that produces sulphuric acid, which inhibits bacterial growth. Additionally, the quick-drying surface of a cut onion reduces the moisture needed for bacteria to multiply. However, it is worth mentioning that the idea of onions being "bacterial magnets" has been disputed, with arguments that no food inherently attracts bacteria and that proper handling practices are more influential in preventing food spoilage.
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Health risks of plastic storage
Plastic food containers are a common feature of modern life, but they can pose certain health risks. Firstly, plastic is not a completely stable material, and when exposed to heat, it can break down and leach unknown chemicals into food and drink. For example, polyethylene and polypropylene, the types of plastic commonly used in food containers, can break down when heated and release chemicals into the food. This is particularly common when plastic containers are used in the microwave or dishwasher. Even plastic containers labelled as "microwave-safe" may not be completely safe from a health standpoint, as the heat can still cause chemicals to transfer from the container into the food. Discolouration of a container is a sign that a chemical change has occurred in the plastic, and such containers should be discarded.
Oily and fatty foods can also attract some plastic chemicals, and recycled plastics used for food containers can increase the risk of contamination. While recycling plastics is important for the environment, recycled plastic is not always safe for use with food. Additionally, the complex chemistry involved in plastic production makes it challenging to know exactly what chemicals are present in plastic food containers. There are thousands of compounds found in plastic products, and the specific chemicals used are often not disclosed to the public.
One particularly concerning chemical found in plastic is bisphenol A (BPA), which has been linked to various health issues. BPA is used to make plastics more durable and shatter-resistant, but it has been associated with an increased risk of infertility, altered fetal growth, attention deficit hyperactivity disorder, aggression in children, polycystic ovarian syndrome, endometriosis, and heart disease. While some manufacturers have started phasing out BPA due to public pressure, it is still present in many plastic products.
To reduce the health risks associated with plastic storage, it is recommended to switch to glass, porcelain, ceramic, or stainless-steel containers, especially for hot foods and liquids. These materials are chemically inert and do not pose the same risks as plastic. While plastic containers are convenient, it is important to be aware of the potential health hazards they may pose and to take steps to minimise exposure to potentially harmful chemicals.
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Safe storage containers
While there is no evidence that onions absorb toxins from plastic, it is important to store them in safe containers to maintain their freshness and prevent spoilage. Here are some tips for choosing the right storage containers for onions:
Choose the Right Material
Onions are best stored in containers made from breathable materials such as wire, mesh, or bamboo. These materials allow proper air circulation, which is crucial for keeping onions fresh and preventing spoilage. Avoid using airtight containers as they can trap moisture and cause onions to rot.
Opt for Baskets or Bags
Baskets and bags are ideal for storing uncut onions. Jute hanging baskets are a great option as they maximize vertical space while adding a rustic charm to your kitchen or pantry. If you prefer bags, look for reusable produce bags made from natural materials like cotton or burlap. These bags are breathable and help keep onions fresh for longer.
Stackable Containers
If you're short on storage space, consider investing in stackable containers. Stackable wire or bamboo baskets, for example, can be placed side by side or stacked on top of each other to maximize storage efficiency. Look for containers with lids or covers to protect onions from pests and moisture while still allowing for air circulation.
Onion Savers
For storing cut onions, onion savers are a great option. These containers are designed to lock in freshness and prevent onion odours from spreading throughout the fridge. They are perfect for storing partially used onions, eliminating the need for plastic wrap or bags. Look for onion savers made from safe materials such as glass or stainless steel.
Keep Them Cool and Dry
When choosing a storage location, opt for a cool, dry, and well-ventilated area. Onions should be stored away from direct sunlight and moisture to prevent sprouting and rotting. A pantry, cupboard, or shelf in a cool part of your kitchen is ideal. If you have a large quantity of onions, ensure they are not crowded together and allow for proper aeration by placing them a few feet away from walls or other items.
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Removing onion smells from plastic
Onions, chilies, and other strong-smelling foods can ruin plastic containers and cutting boards. There are several methods to remove onion odours from plastic, and you may find that using two or more of them together works best. Here are some options:
Baking Soda
Baking soda is a super budget-friendly option that works by attracting and neutralizing odour molecules. Sprinkle a generous amount of baking soda all over the inside of your container, making sure to cover every bit of it. If possible, close the container and let it sit overnight. For larger plastic items, mix some baking soda with a little water to make a paste and rub it all over the surface. After letting it sit, wash the container with warm, soapy water.
Vinegar and Water
Mix equal parts water and white vinegar, then fill your plastic container with the mixture. Let it sit for about 30 minutes to an hour to neutralize the odours. For tougher smells, you can use undiluted white vinegar. After treatment, be sure to wash the container thoroughly with soap and warm water to remove any residual vinegar odour or taste.
Lemon
The citric acid in lemons works as a deodorizer and cleaner, while the natural enzymes in lemon juice help break down leftover oils that may be holding onto the onion smell. Squeeze fresh lemon juice directly onto the plastic and rub it around, or place lemon slices inside the container, ensuring the lemon juice comes into contact with all parts of the container. Let it sit for about 15 to 30 minutes before washing it out.
Sunlight
Place the container outside in direct sunlight for a couple of hours. Sunlight is effective at removing odours, but this method may not be practical for those who live in apartments or areas with limited sunlight.
Coffee Grounds
Coffee grounds contain nitrogen, which helps neutralize odours at a molecular level. Place coffee grounds in your plastic container and let them sit for a few days.
Charcoal
Activated charcoal has tiny holes that trap odour molecules. Place a small bag or a few pieces of activated charcoal in your plastic container, seal it tightly, and let it sit for a few hours or overnight. Charcoal can continue absorbing odours for days, making it a long-lasting solution.
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Chemicals in plastic
Plastics contain a wide range of chemicals, which are added to change and improve their performance. Some of these chemicals are useful and safe, while others are of high concern due to their potential adverse impacts on human health and the environment. These "chemicals of concern" are released into the environment over time from plastics during manufacture, use, or when the product becomes waste. They have concerning properties, such as not easily breaking down and lasting for long periods in the environment, being toxic, and building up to high levels.
The "Chemicals in Plastics: A Technical Report" by the UN Environment Programme (UNEP) identifies ten groups of chemicals of major concern due to their high toxicity and potential to migrate or be released from plastics. These include specific flame retardants, certain UV stabilizers, per- and polyfluoroalkyl substances (PFASs), phthalates, bisphenols, alkylphenols and alkylphenol ethoxylates, biocides, certain metals and metalloids, polycyclic aromatic hydrocarbons, and many other non-intentionally added substances (NIAS).
These chemicals of concern have been found in plastics across various sectors and products, including toys and other children's products, packaging (including food contact materials), electrical and electronic equipment, vehicles, synthetic textiles, furniture, building materials, medical devices, personal care and household products, and agriculture, aquaculture, and fisheries.
The best way to find out if a plastic product contains high-concern chemicals is by requesting this information from the product's manufacturer or retailer. To address the issue of chemicals in plastics, the Australian Government has established the Industrial Chemicals Environmental Management Standard (IChEMS) to help industries and governments manage the environmental risks associated with these chemicals.
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Frequently asked questions
Onions are like sponges and can absorb substances from their environment, including the chemicals found in plastic.
One of the toxins in plastic is BPA, a chemical found in some plastics that can interfere with hormone regulation in the body.
The health risks of consuming onions that have absorbed toxins from plastic include potential hormonal imbalances, reproductive issues, increased cancer risk, and developmental and behavioral issues in children.
It is recommended to store onions in safe, alternative containers like mesh bags, pantyhose, brown paper bags, or wire baskets. These options provide adequate ventilation to keep onions dry and fresh while avoiding the potential chemical leaching that can occur with plastic storage.
There are several natural ways to remove onion smells from plastic containers, including using baking soda, lemon juice, activated charcoal, or vinegar. These substances help to neutralize and absorb odors, leaving your plastic containers smelling clean.
