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Which Plastics to Never Use with Food
(picture courtesy of Care2.com)
Although the apron-wearing, martini-bearing, housewife-in-heels with her rainbow of Tupperware may be a thing of the past, the quest for a well-organized kitchen persists. To see tidy stacks of food-filled plastic containers in the fridge and freezer is comforting in a primal kind of way. But then comes the procession of warnings about storing and cooking food in plastic, and leaching chemicals, and hormone disruption, and ACK! So here it is: The lowdown on plastic food containers.
Flip over your favorite plastic food storage container and check the recycling code number. If you spy a number 3 or 7, well, those containers should probably go to the craft room or garage to store buttons or screws rather than food. If there is no number listed, contact the manufacturer. (And to be fair to Tupperware, they do manufacture products that are not made of these plastic types.)
Number 3 is polyvinyl chloride (PVC), also known as vinyl. PVC has garnered the moniker “the toxic plastic” for the presence of DEHA–one of several plasticizers (softeners) used in its production. According to the Environmental Protection Agency, long-term DEHA exposure has the potential to cause: Reduced body weight and bone mass; damage to liver and testes; and cancer. The manufacture and incineration of PVC also releases carcinogenic dioxins into the environment and food chain. Although PVC is not the most common plastic used for food storage containers, some are made from it and it is often used in plastic wrap to improve performance.
Recycling code number 7 includes several plastic types (it’s the catchall “other” category–see tips below) but it is predominantly polycarbonate. The problem with polycarbonate is that it harbors bisphenol A (BPA). Studies have shown that BPA damages the reproductive systems of lab animals by interfering with the effects of reproductive hormones and has other serious health effects. BPA’s capacity to cause these stems from its ability to mimic the human hormone estrogen–it has been linked to prostate and mammary gland cancers, early onset of puberty and reproductive-organ defects.
As might be expected, given the strength of the plastic industry, there is controversy. Although there have been more than 100 studies showing BPA to be a concern, the plastics industry says it is harmless. The FDA admits that “substances used to make plastics can leach into food,” but they maintain that the levels are safe. Safe?! Yes, leaching petroleum by-products and toxic chemicals in your food are safe–don’t worry! Now why doesn’t that sound right? If, like me, you find the FDA a rather lackadaisical regulator, why not follow these tips for safer plastic use? (There is also that little environmental issue with plastic to keep in mind.) And while some may want to skip the plastic-food relationship altogether, it is a hard habit to break. Many of these tips don’t exclude the use of plastic, but rather offer the safest options.
1. Know your plastics. Plastic items are marked with a resin identification coding system (the number surrounded by arrows), which stand for:
2. When you need to use plastic, these are the safer choices to use with food: 1, 2, 4 and 5.
3. Learn to recognize, and then avoid, polycarbonate (number 7) for food usage. Polycarbonate plastics are hard and clear. Common items made from this BPA-containing plastic are food storage containers, baby bottles, water bottles, bowls and tableware. (And the lining inside food and drink cans, by the way.)