Articles and resources on the leaching of plastics

There is extensive information on the web and in journals and magazines about plastics and leaching. Not all information is created equally. There is good research and bad research. When searching for more information, please seek reputable sources. If something sounds fishy, get comparative articles. I have assembled just a few articles below that may help you. In all the reading I have done about this subject I still can’t find specific scientific research on zip-loc style freezer bags. What I do know is that BPA, DEHA, and plasticizers in general cause the greatest concern in regards to leaching. Ziploc specifically states on their website that they do not use BPA, DEHA or plasticizers in the production of their bags. Glad stated the same thing in email correspondence with me.

Of course, as so much in life, there is always one’s own personal comfort zone. Having reused my bags hundreds of times with Bag-E-Wash, I am confident of their integrity and happy to eliminate waste by reusing my bags. But I do believe each individual has to decide for him or herself based on their comfort zone. I hope you will find the following helpful in your decisions.

General information on kitchen plastics and safety

• Seventh Generation – The Non-Toxic Times, May 2003

This article gives clear information on plastic food storage containers. At the bottom of the article they reference The Green Guide’s list of safe kitchen plastics. They do this by recycling code but then go further and cite name brands. It looks like most, if not all, of the name brand makers of freezer bags are on the list. Find the article here:

• FDA – FDA Consumer Magazine

This article addresses the concerns of microwaves and plastic. Although not necessarily relevant to dishwashers and plastic, it does contain information about what is in some food storage receptacles that contributes to leaching. One chemical is DEHA which is a plasticizer. As evidenced further along on this sheet neither Glad nor Zip-loc use any plasticizers in their bags. Find the article here:

BPA - Bisphenol A

• Mizzou News – Alumni Newsletter for University of Missouri

Fred vom Saal’s is one of the foremost researcher’s on BPA and leaching. Bisphenol A is on the top of the list of bad chemicals found in plastics according to vom Saal. BPA acts as an artificial estrogen. This chemical is used to line cans and in dental sealants as well as in many more things. vom Saal’s research is essential reading for anyone concerned about plastics in their environment and the consequences. The first online article listed below is short reading. The second address will link to all the extensive research, literally hundreds of pages. Please note below that Ziploc states they do not use BPA in their bags. Find those articles here:

Answers from the bag manufacturers

• Ziploc Website (Parent company SC Johnson)

In a question posed on their FAQ page SC Johnson states that they do not use BPA. They go on to say that, “A recent study conducted and published by the University of Cincinnati found that the estrogen-like chemical, BPA (bisphenol A), has been shown to encourage the growth of a specific category of prostate cancer cells. BPA is commonly used in the manufacture of certain plastic products, such as food cans, milk container liners, food containers, and water supply pipes. As a result, media have been reporting on this study and the fact that this chemical is commonly found in plastic food storage containers. SC Johnson does not use BPA in its plastic products. Find the whole answer and more here:

• Glad Food bags website and email correspondence

On Glad’s website, they state that the bags are made from 100% polyethylene and that no plasticizers are used in their bags. In follow-up correspondence in which I asked if that includes BPA and DEHA, they confirmed that their bags do not have those chemicals. In accessing their FAQ, go to the address below then click on food bags if it isn’t on the opening page.