Microwaving vs. Freezing Plastic: Expert Insights on Safety Risks You Need to Know!
In recent times, concerns surrounding the safety of plastic products have surged, particularly in relation to microwave use. A new class action lawsuit against Ziploc claims that the “microwave safe” label on its products is misleading, primarily due to the potential increase in microplastic exposure when microwaving these containers. Microplastics, tiny fragments of degraded plastic, may jeopardize human health, prompting further investigation into the safety of microwaving plastic containers.
This lawsuit, filed against S.C. Johnson, the parent company of Ziploc, questions the integrity of the “microwave safe” claims, suggesting that consumers have not been sufficiently warned about the risks of microplastic release during microwaving or freezing. The complaint asserts that these Ziploc products are “fundamentally unfit for microwave and freezer use.”
In a response to the lawsuit, an S.C. Johnson spokesperson stated, “We believe Ziploc products are safe when used as directed and that the lawsuit is without merit.” However, this raises an important question: Is it truly safe to microwave or freeze plastic? Here’s a deeper look into the issue.
Understanding Microplastics and Their Risks
Microplastics are typically defined as plastic fragments less than five millimeters in size, resulting from the degradation of larger plastic pieces. Exposure to microplastics is omnipresent, impacting the food and water we consume, as well as the air we inhale.
- Modern human brains may contain the equivalent of a plastic spoon’s worth of microplastics, according to recent studies.
- Research is ongoing to fully understand the health implications of microplastic exposure; however, findings to date are concerning.
According to Katie Pelch, PhD, a senior scientist at the National Resources Defense Council, “Where we’ve looked, we’ve found harm.” Her recent study analyzed previous research indicating potential harms to reproductive, digestive, and respiratory systems. Moreover, microplastics may also be associated with serious health conditions such as colon and lung cancer. Other studies have raised alarms about their impact on brain and heart health.
The Risks of Microwaving or Freezing Plastic
Research indicates that microwaving food in certain plastic containers can significantly exacerbate microplastic exposure. For instance, one 2023 study found that microwaving polypropylene containers for just three minutes released millions of microplastic particles into the food. While keeping foods in plastic containers at room temperature does result in microplastic release over time, the rate is not as high as when microwaved.
In addition, keeping food in plastic containers in the freezer might also heighten microplastic exposure. Carmen Marsit, PhD, a professor of environmental health at Emory University, explains that “the freezing process might make the plastic more brittle, leading to more shedding of microplastics into the food products.”
Other Potential Dangers of Microwaving Plastic
Aside from microplastic concerns, several chemicals in plastics, such as PFAS “forever” chemicals, phthalates, and BPA, are also known to pose health risks. Notably:
- PFAS chemicals have been linked to serious health issues, including increased cancer risks, decreased immunity, and reproductive complications.
- Heating plastic containers can facilitate the leaching of these harmful chemicals into food.
- Signs that chemical leaching is occurring include the plastic container becoming softer when microwaved.
Pelch advises that the safety and type of chemicals you’re exposed to can vary depending on the specific plastic. However, as a rule of thumb, it’s wise to minimize or avoid microwaving any plastic product, regardless of its “microwave safe” label.
Is It Time to Eliminate Plastic from the Kitchen?
Avoiding all plastics may be impractical, but there are several easy alternatives you can implement in your kitchen:
- Opt for Glass or Ceramic Containers: These materials are generally considered safe for both microwave and freezer use. Just remember to remove any plastic lids before microwaving.
- Replace Non-Plastic Items: Consider swapping out plastic cutting boards and blender pitchers for alternatives made from safer materials.
- Avoid Nonstick Cookware: Many nonstick products are coated with PFAS chemicals, which can degrade over time and contribute to microplastic pollution.
While it’s challenging to eliminate all plastic, focusing on minimizing contact between food and plastic in your kitchen can be a crucial step towards a healthier lifestyle. Marsit encourages making gradual changes to reduce plastic use and enhance safety.
