Warning: Possible problems with new Ziploc bags

Ziploc brand bags have been a go-to for corn allergy people for some time now. Plastics can be an issue for corn allergies, but the particular plastic in ziploc bags was from petroleum and was not dusted or oiled with anything. I personally have been using Ziploc bags for freezer storage, cosmetic and utensil storage, packing while traveling, and even to package my custom processed meat. Well, as it turns out, nothing good can last forever, because there may be an issue with the new version of the Ziploc bags that hit the shelves a few weeks ago.

The new bags have an “easy open tab” and look like this.


In addition to the new closure, the bag itself is a different texture, simultaneously thinner and shinier, and a couple of the very, very sensitive folks have reported reactions to it. One of the people reporting reactions was also the first to notice an issue with the new Ball BPA-free canning lids, so I am minded to heed this warning and exercise caution. Around the same time as people started reporting reactions, i started having some signs of mystery inflammation that started around the same time as I started using the new bags here and there. I also added back the honey that I had run out of for a few weeks that had been safe for me previously around that time, so I have cut them both and will update this post if re-introduction reveals a clear culprit.

For now, I would not panic, just exercise caution with these new bags. If you are in a delicate health state or have delayed or hard to pin reactions, I would not try them until you have your diet otherwise stable so that you don’t get confused about what the cause of any potential issues is.

I have not done any work to contact Ziploc and find out what they say changed or not, I am only reporting reactions at this time. if someone does correspond with Ziploc and wants to post those results here, that would be welcome.

Update Feb 2017: A couple months ago I re-introduced the Big Tab ziploc bags and had esophageal swelling from all food that had been in one. Not safe for me. I can’t be sure if this is a corn issue or not, but they are definitely not okay for me. I have a stockpile of the old-style bags and am moving to glass pyrex or anchor hocking storage containers, mason jars, metal U-Conserve storage containers, and other reusable options  when possible, and Reynolds brand aluminum foil when I absolutely need something disposable.


Update June 2017:  I have been using the Ziploc stand & fill slider bags, both the freezer & storage, since last Feb and have been doing great with them. These may be an option for you if the easy-tabs don’t work.

5 thoughts on “Warning: Possible problems with new Ziploc bags

  1. Pingback: Safe-for-Me Products: The List of What I Use | Corn Allergy Girl

  2. Hi, First off, thank you for all the work and research you do. I reacted to my rice that was put in one of these darn bags, overnight. I do not react by touching them, so I did not think they would be unsafe. My corn allergy is to processed corn, because it is typically processed with sulfuric acid and I am allergic to sulfites/ sulfur, also have MCS and allergic to gluten. My reaction was not quite my standard sulfite/processed corn reaction as there was no headache with it .. but dizzy, throat going weird, panic, etc. I also felt the twitchy feeling in the nerves in my body like I do when exposed to gluten. I had a look at the bag, mine was not shiny and the plastic actually seemed as thick as usual, I noticed on the bottom of the body that they disclose that the bags are made with polyethylene, dye and ink. the bags themselves have a bit of blue dye added, it seems. I believe these are a bio-plastic version of polyethylene, which can be made from sugar cane, sugar beets, wheat grain (probably corn too, although the article I found did not actually mention corn.)

  3. Ok I just called and they said no corn or wheat, although they do not know what the polyethylene is sourced from and can not say everything that the bags contain as it is proprietary. They did say that my doctor could file paperwork and they would tell him, but both him and I would have to agree to non-disclosure. They did say that any of you reacting should call them too, and report the reaction to their medical department. Now the question is, do we believe them ? Could they be wrong ?

  4. Thank you for the update. I have kept this post in the back of my mind as I noticed I mistakenly ordered the wrong ziplocs recently and we have been having a series of reactions that I could not pinpoint. I was worried it was my butcher’s meat being contaminated on his end. Now I know it is on my end that I have corntaminated it. I was hoping it was not the ziplocs because I don’t know how else to freeze my meat. I went back on Amazon though and was able to find the double zipper ziplocs that do not have the easy pull tab. I think these are still safe for us. I hope so! Have you tried those ones as well? I am sorry for your reaction. I hope you were able to get the swelling to come down quickly. I am relieved to finally know the likely culprit behind our recent ongoing reactions.

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