store bought juices

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gump

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is there something in the store bought juices that keeps them from fermenting ,are is my house temp to low , sure would like to know if anyone is having problems. like froz blue berrys , mine start then stop yeasty beasty just die .may the force be with you :)
 

TGFV

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Are you checking for preservatives?

Some store bought juice has preservatives to extend shelf life that inhibit wild yeast and bacteria from growing in it but also keeps commercial yeast from fermenting it.
 

jgmillr1

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is there something in the store bought juices that keeps them from fermenting
Generally speaking, yes. The juice manufacturers want the juice not to ferment on the store shelves and take steps to prevent this. You should carefully inspect the ingredient list for the addition of sorbate or benzoate. If either of those is in there, you won't have much luck getting a fermentation to proceed. Sometimes you'll see metabisulfite in there and that is OK to use, since wine yeast can tolerate it. Some juice (welches concord) is pasteurized and does not contain preservatives.

However, frozen whole fruit or frozen juices usually do not have added preservatives, so you might have better luck there.
 
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