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You Ask, I Answer: Unsulfured Dried Fruit

slicestjoes300x413.jpegToday at the supermarket I saw dried fruit that had “unsulfured” written on the packaging.

Is that a healthier choice?

– Lindsay Kleiner
Chicago, IL

Sulfur dioxide is a much-loved additive by the food industry since it does three things very well:

  1. It prevents natural enzymatic processes (ie: the reason why apple slices turn brown when exposed to air) from happening
  2. It makes bacterial growth on food almost impossible
  3. It severely delays spoilage

It does what is the most beautiful of all music to food companies: EXTENDS SHELF LIFE!

Is sulfur dioxide harmful?  It depends on context.

If you worked in a factory alongside vats of sulfur dioxide and decided to take a whiff from one, then, yes, you would be in severe trouble (and most likely dead by the time an ambulance arrived).

That, of course, is an extreme example, and one that could be applied to many foods we safely consume on a daily basis (the 200 or so milligrams of caffeine in two cups of coffee is of no concern, but if you are injected with 50,000 milligrams of caffeine intravenously, it’s a very different story).

The amount of sulfur dioxide in dried fruit is too insignificant to have any impact on human health.  It would only be an issue if you consumed ridiculously — and implausibly — high amounts of dried fruit on a daily basis for several years.

That said, there are three significant reasons why people seek out unsulfured dried fruit.

First, many consumers choose to avoid foods that contain additives (for instance, to support organics).

Number two?  Taste!  Some people are sensitive to an off-flavor that can be characteristic of fruits that contain sulfur dioxide.

Then there’s the paramount issue that resulted in the mandatory labeling of sulfured — and unsulfured — products: allergies.

People who are allergic to sulfur dioxide have absolutely horrible respiratory reactions when exposed to even the tiniest of amounts.  In the 1980s there were actually a few deaths as a result of individuals allergic to sulfur dioxide consuming unlabeled products that contained the additive.

As a result, starting in 1987, food products that contained sulfur dioxide at levels of at least 10 parts per million must list it on the ingredient list (where it is usually listed as “to preserve freshness”).

I’m personally a huge fan of unsulfured dried fruit.  I find it tastes better.  Besides, I don’t mind if my dried fruit isn’t super shiny and colorful.

The more important thing to keep in mind when buying dried fruit is to avoid varieties with added sugars, artificial colors, and partially hydrogenated oils!



  1. miami said on April 30th, 2010

    funny, as i was just munching on some “unsulfured, sweetened, dried mangos” from trader joes, i decided to look up exactly what unsulfured means and i find this – and you contain a picture of trader joe’s dried fruit! and i live in chicago…just like the person asking the question. cool! good info on this, by the way. you totally answered all of my questions, too.

  2. alaska said on March 2nd, 2013

    funny indeed, because I too was just snacking on the exact same “ununsulfured, sweetened, dried mangos” product from trader joe’s! and I then decided to find out what unsulfured means. I don’t live in chicago though.

  3. Lola said on June 12th, 2013

    Ditto for me! I read it on the back of a Trader Joes Mango with chili and decided to look up unsulfured.

  4. Weird said on July 31st, 2013

    I’m also currently munching on Trader Joe’s unsulfured, sweetened, and dried mangoes. In Chicago. Spooky.

  5. Adam said on August 17th, 2014

    I too am currently devouring a bag of Trader Joes Chile Spice Mangos. Dry and unsuldered a year later. Mmm

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