Google Answers Logo
View Question
Q: Food Grade Aluminum ( Answered 5 out of 5 stars,   1 Comment )
Subject: Food Grade Aluminum
Category: Science
Asked by: maeve100-ga
List Price: $5.00
Posted: 23 Aug 2005 14:26 PDT
Expires: 22 Sep 2005 14:26 PDT
Question ID: 559427
Is food grade aluminum digestible? (In relation to: my guinea pig ate
the foil lid to a Yoplait yogurt.  Yoplait said it was just made from
food grade aluminum.  I am trying to see if food grade aluminum is
digestible in general.)
Subject: Re: Food Grade Aluminum
Answered By: denco-ga on 23 Aug 2005 18:06 PDT
Rated:5 out of 5 stars
Howdy maeve100-ga,

The term "food grade" in reference to a material, such as the aluminum
foil that is on the top of yogurt containers, does not reference whether
it is edible or not, but rather that it can be used in contact with food.

The article "Food Storage In The Home" by Charlotte P. Brennand, PhD,
and Deloy G. Hendricks, contains a description of a food grade material.

"A food-grade container is one that will not transfer non-food chemicals
into the food and contains no chemicals which would be hazardous to human

As for the edibility of the aluminum foil lid of a yogurt container, it
just isn't digestible.  Although the following are references to dogs
and cats, animals are pretty much animals.

"Dealing with Your Dog's Digestive Dilemmas" adapted From: "Dog Health &
Nutrition For Dummies" from the web site talks of this.

"Another common reason for vomiting is the condition that veterinarians
affectionately call garbage gut. Most dogs are pretty indiscriminate
about what they eat, and they can develop gastritis (inflammation of the
stomach) from eating garbage, especially if they consume a few indigestible
ingredients such as aluminum foil along with the edibles. A dog with garbage
gut often vomits several hours after eating, after the stomach has made a
good try at digesting the indigestible. After the dog regurgitates the
offending material, she's usually fine."

The Spring 2004 issue of "Yolo Tails," News from the Yolo County SPCA
("Society for the Prevention of Cruelty to Animals") comes right to point.

"Foil is indigestible and can block intestines."

Earlier in the same newsletter, they talk of other potential health issues.

"Plastic wrap and foil candy wrappers can choke your pet, cut the inside
of his esophagus or stomach, or block intestines."

If your guinea pig acted like most guinea pigs I have seen, it nibbled at
the aluminum foil lid, and only bit off small pieces.  As the foil that
covers these containers is pretty thin, it is also pretty malleable, so the
potential health hazards might be reduced.  As the old joke goes, the foil
will (hopefully) work itself out in the end.  Good luck!

If you need any clarification, please feel free to ask.

Search strategy:

Google search on: foil indigestible

Google search on: "food grade" definition

Looking Forward, denco-ga - Google Answers Researcher
maeve100-ga rated this answer:5 out of 5 stars
Very detailed, exactly what I needed to know. :-).  And for those
concerned - my guinea pig is just fine after his metal munchies ;-).

Subject: Re: Food Grade Aluminum
From: denco-ga on 30 Aug 2005 17:21 PDT
Thanks for the 5 star rating, maeve100-ga, and glad to hear your guinea
pig is doing well.  I just wouldn't (and I know you won't) make it part
of your pet's regular diet.  A little too much roughage, I would think.

Looking Forward, denco-ga - Google Answers Researcher

Important Disclaimer: Answers and comments provided on Google Answers are general information, and are not intended to substitute for informed professional medical, psychiatric, psychological, tax, legal, investment, accounting, or other professional advice. Google does not endorse, and expressly disclaims liability for any product, manufacturer, distributor, service or service provider mentioned or any opinion expressed in answers or comments. Please read carefully the Google Answers Terms of Service.

If you feel that you have found inappropriate content, please let us know by emailing us at with the question ID listed above. Thank you.
Search Google Answers for
Google Answers  

Google Home - Answers FAQ - Terms of Service - Privacy Policy