before we get started, let's first address why you should be drying your own fruit - especially when dried fruit is available just about anywhere (and by that we mean even the grimiest of gas stations are stocking it these days!). according to the folks over at wikipedia, some commercially available dried food product are first treated with sulfur dioxide to enhance the color of the product after drying. the problem? sulfur dioxide can trigger asthma symptoms in those with the disorder. you can avoid purchasing sulfur dioxide - treated food by always opting for organic dried food product