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Kitchen Safety: Can Plastic Kitchen Containers Contaminate Our Food?

Plastic Glasses

Plastic is everywhere, from Tupperware to plastic wrap, to bowls and utensils -- even paper cartons and deli paper are usually sprayed with a layer of plastic. Plastic is a treacherous biohazard for two reasons:

  1. It can leach carcinogenic chemicals into our food (and our bodies) from plastic food packaging; and,
  2. Perhaps just as alarming, plastics are contaminating our environment.

Can plastic containers contaminate our food? They're made from a variety of toxic chemicals, including a known class of carcinogens called phthalates (which are softeners that are added to make plastic flexible) and Bisphenol A (BPA), both of which can migrate into food.

Have you ever smelled that "plastic" smell of milk stored in plastic jugs? Or in the apple juice in your child's sippy cup? That smell may mean that the plastic has made its way into the drink.

The debate of plastic's safety around food continues. The FDA claims that all plastic is tested before it is approved for use with food and should be safe, but admits that heating plastic can cause plastics to leach into the food.

Plastics are Forever

The potential risk of plastics goes beyond the dinner table into the realm of environmental hazard. Don't let the myth of plastic's recyclability fool you: just because a container has circular arrows with a number in the middle, it does not necessarily mean that it is recycle-ready. These numbers only identify what type of plastic the product contains, not the availability of recycling in your area.

The sad fact is that a great deal of plastic never gets recycled. Even if you recycle plastic at home, chances are that those water bottles and yogurt containers will end up shipped to third world countries or floating atop our oceans.

Toward a Safer Plastic

Debate has been raging about emerging trends in "bioplastics" made from corn. Don't confuse this "sustainable plastic" with biodegradable plastic, which is petroleum-based and dense with toxic chemicals. Bioplastics do show promise, but when made with genetically modified corn, it may provide no better solution than regular plastics.

As consumers, we can vote with our dollars by buying bioplastic products. Earthware sells bio-plastic forks, spoons and knives, which are an eco-friendly alternative to traditional plastic utensils. BIOgroup USA, Inc. sells BioBag trash bags, which are based on starch, vegetable oil and other renewable resources.

Better yet, consumers can take advantage of products that eschew plastic altogether. Wooden spoons and spatulas are a great substitute for plastic kitchen utensils. Wooden, glass, and stainless steel bowls easily replace plastic ones. Unbleached, natural waxed paper and bags are a good substitute for plastic sandwich bags and plastic wrap (we like Natural Value bags and paper).

To minimize use of plastic (and unrecylcable) containers, some grocery stores allow shoppers to bring in their own containers (of whatever material they choose). Another easy idea to minimize the use of plastic shopping bags is to ask for paper bags -- or bring your own mesh, cloth, or recycled bags with you.

Another new, potentially exciting alternative to plastic wrap is an edible food wrap made from concentrated fruit and vegetable purees with vegetable oils added to make them more water resistant. They are not only completely biodegradable, but provide a healthy serving of fruit or vegetables, too!

No matter how you wrap it, plastics aren't a green kitchen's best bet.


Sources

  • Dobias J, Chudackova K, Voldrich M, Marek M: Properties of polyethylene films with incorporated benzoic anhydride and/or ethyl and propyl esters of 4-hydroxybenzoic acid and their suitability for food packaging. Food Addit Contam. 2000 Dec;17(12):1047-53.
  • Kale G, Kijchavengkul T, Auras R, Rubino M, Selke SE, Singh SP: Compostability of Bioplastic Packaging Materials: An Overview. Macromol Biosci. 2007 Mar 16;7(3):255-277
  • Tsai WT. Human health risk on environmental exposure to Bisphenol-A: a review. J Environ Sci Health C Environ Carcinog Ecotoxicol Rev. 2006;24(2):225-55.
  • Kang JH, Kondo F, Katayama Y. Human exposure to bisphenol A. Toxicology. 2006 Sep 21;226(2-3):79-89. Epub 2006 Jun 16.

Third Party Links (Articles, Videos and Reference)

  • We found a great PDF file on the internet that gives a fairly comprehensive list of green product alternatives for the kitchen, along with places that sell these items and (in many cases) phone numbers to call.
  • See also "Drowning in an Ocean of Plastic", which appeared in Wired Magazine
  • Paul Goettlich outlines several more great ideas in an article on Mindfull.org, a useful website with a lot of great ideas.
  • This overview from GreenGuide.com, now owned by National Geographic provides a helpful reference to kitchen safe plastic containers. 

Wider & Alternative Perspectives

  • Dr. Rolf Halden at Johns Hopkins University debunks some of the dangers of using plastics for food storage, but suggests that heating food in plastic containers can be unsafe.
  • Heather Hatfield on WebMD Medical News questions the problems with plastics
  • Sustainability
  • bioplastic
  • dairy
  • microwave
  • Naturalpath.com Staff Writer
  • plastic
  • recycling
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Comments

March 22, 2007 - 3:00pm — frankie

Can't get away

You just can't get away from plastics, they are everywhere! Don't people think about how long these things are going to be around??
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March 20, 2007 - 1:07pm — lovely

Water bottles

One thing this article didn't mention was water stored in plastic jugs. I used to carry around a bottle of water all the time, but now i try to drink from glass instead.
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March 22, 2007 - 2:55pm — habbaola

Water bottles

I've heard that it is especially bad with plastic bottles and now I carry around an aluminum bottle that is ceramic on the inside.
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March 20, 2007 - 1:06pm — Liv

Plastics in the microwave

i've heard various things about how safe it is to heat food in a plastic container in the microwave. first i'd heard it was a bad idea. then i heard that it was just a myth. does anyone know how i can find out the truth?
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March 20, 2007 - 1:05pm — maggisv

That's too bad.

I love and collect vintage Tupperware. what a bummer that it may be toxic! i know that metal and wood may be better, but i just love the look and pretty colors of some plastic items. i'll bet it's not too bad if you don't heat things up in it.
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